Grilled Lamb Leg Steaks with Mint Pesto

Lamb leg steaks are one of the most underrated cuts you can throw on the grill. They’re thick, meaty, and full of rich flavor that pairs beautifully with fresh herbs and bright, punchy sauces like mint pesto.

This recipe delivers restaurant-quality results with minimal fuss. You’ll get a perfect medium-rare center with a charred exterior, and the mint-pistachio pesto cuts through the lamb’s richness in the best way possible.

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Why Lamb Leg Steaks Work Better Than Chops

Most people reach for lamb chops when they want to grill lamb, but leg steaks deserve more attention. Cut from the top round or sirloin portion of the leg, these steaks give you a larger, meatier portion without the bone getting in the way.

The texture is different from chops too. Leg steaks have more bite and substance, similar to a good sirloin steak from beef. They’re not as tender as loin chops, but they have way more flavor. If you’re interested in learning more about different options, check out this guide to lamb cuts to understand what else is available.

You’ll also find leg steaks to be more budget-friendly than racks or loin cuts. They’re a great choice when you want to serve lamb to a crowd without breaking the bank.

Selecting Your Lamb Leg Steaks

Look for steaks that are at least 3/4 inch thick, preferably closer to 1 inch. Thin steaks overcook too quickly on a hot grill, and you’ll end up with gray, tough meat instead of that perfect pink center.

Color matters too. Fresh lamb should be a light to medium red, not brown or gray. The fat should be white or cream-colored, never yellow. A little marbling throughout the meat is good, it keeps things juicy during cooking.

If you see “American lamb” versus imported options from New Zealand or Australia, either works fine here. American lamb tends to be slightly larger and milder, while imports often have a more pronounced lamb flavor. Choose based on your preference, but don’t stress about it. The cooking method and pesto will shine regardless.

For those curious about the nutritional differences between lamb and other meats, this lamb vs beef comparison provides useful context.

Making the Mint-Pistachio Pesto

Traditional basil pesto is great, but mint belongs with lamb. This version uses pistachios instead of pine nuts for a slightly sweeter, richer flavor that complements both the mint and the lamb.

Ingredients for Mint Pesto

• 2 cups fresh mint leaves, loosely packed
• 1/2 cup fresh parsley leaves
• 1/2 cup shelled pistachios, lightly toasted
• 2 cloves garlic, roughly chopped
• 1/2 cup grated Parmesan cheese
• 1/2 cup extra virgin olive oil
• 2 tablespoons fresh lemon juice
• 1/2 teaspoon salt
• 1/4 teaspoon black pepper

Add the mint, parsley, pistachios, and garlic to a food processor. Pulse until everything is roughly chopped. Scrape down the sides, then add the Parmesan, salt, and pepper.

With the processor running, slowly drizzle in the olive oil until you get a smooth but slightly textured paste. You don’t want it completely liquefied. Add the lemon juice and pulse a few more times to combine.

Taste and adjust seasoning. You might want more salt, more lemon, or even a pinch of red pepper flakes if you like heat. Make this at least 30 minutes before serving to let the flavors meld. It’ll keep in the fridge for up to 5 days with a thin layer of olive oil on top.

If you’re interested in other pesto variations, this collection of basil pesto recipes offers plenty of inspiration that you can adapt with different herbs.

Preparing the Lamb Steaks

Take your steaks out of the fridge 30 to 45 minutes before grilling. Cold meat doesn’t cook evenly, and you’ll end up with an overdone exterior and cold center.

Pat them completely dry with paper towels. Moisture on the surface prevents proper browning and creates steam instead of a good crust.

Season generously with salt and freshly ground black pepper on both sides. I mean really generous. A lot of the seasoning will fall off or get lost in the cooking process. You can add other spices if you want (cumin, coriander, and smoked paprika all work well), but salt and pepper is perfectly fine for letting the lamb flavor shine through.

Brush each steak lightly with olive oil. This helps prevent sticking and promotes even browning.

Setting Up Your Grill

You need high, direct heat for this recipe. Get your grill screaming hot, around 450 to 500°F if you’re measuring. For charcoal, that means a full chimney of coals spread in an even layer. For gas, crank all burners to high and give it at least 15 minutes to preheat.

Clean your grates thoroughly with a grill brush. Dirty grates cause sticking and off flavors. After brushing, oil the grates by dipping a wadded paper towel in vegetable oil and rubbing it over the grates using tongs.

You want visible heat waves coming off the grill. That’s when you know it’s ready. Don’t rush this part. A properly preheated grill makes all the difference between mediocre grilled meat and restaurant-quality results.

Grilling the Steaks

Place the steaks on the hottest part of the grill. You should hear an immediate, aggressive sizzle. If you don’t, your grill isn’t hot enough yet.

Leave them alone for 4 to 5 minutes. Don’t move them, don’t peek under them, don’t press on them with your spatula. You’re building a crust and those beautiful grill marks.

After 4 to 5 minutes, flip them once. You should see dark brown, slightly charred grill marks. If they’re sticking badly, they’re not ready to flip yet. Give them another minute.

Cook for another 4 to 5 minutes on the second side for medium-rare. This timing assumes 1-inch thick steaks. Thinner steaks need less time, thicker ones need more.

Use an instant-read thermometer to check doneness. Pull them at 125°F for rare, 130 to 135°F for medium-rare, 140°F for medium. I strongly recommend medium-rare for leg steaks. They get tough and dry if you cook them past medium.

A reliable instant-read thermometer is essential for grilling any meat properly. You can check current prices on instant-read thermometers on Amazon to find one that fits your needs.

Resting and Serving

Move the steaks to a cutting board and tent them loosely with foil. Let them rest for 5 to 7 minutes. This isn’t optional. The muscle fibers need time to relax and reabsorb juices, or everything runs out onto your cutting board when you slice.

After resting, slice each steak against the grain into 1/2-inch strips. Look at the direction the muscle fibers run and cut perpendicular to them. This shortens the fibers and makes each bite more tender.

Arrange the sliced lamb on a platter and spoon the mint pesto generously over the top. You can also serve the pesto on the side and let people add their own, but I prefer coating the meat directly so every bite gets that herby, nutty flavor.

Finish with a sprinkle of flaky sea salt and maybe some extra chopped pistachios or mint leaves for garnish if you’re feeling fancy.

What to Serve Alongside

Grilled vegetables are the obvious choice and they make sense. Zucchini, bell peppers, eggplant, and red onions all work beautifully. Toss them in olive oil, salt, and pepper, then grill them alongside the lamb.

A simple Greek salad with tomatoes, cucumbers, red onion, olives, and feta cheese fits the Mediterranean vibe of this meal. Dress it with lemon juice and olive oil.

For something more substantial, roasted or grilled potatoes are excellent. Baby potatoes tossed in olive oil with rosemary and garlic, then cooked in a grill basket, complement the lamb without overwhelming it.

Couscous or rice pilaf works too, especially if you want something to soak up the pesto and meat juices. Keep it simple with just butter, salt, and maybe some toasted almonds or dried currants.

Variations and Adjustments

If you can’t find pistachios or they’re prohibitively expensive, swap in toasted walnuts or almonds. The flavor profile changes slightly, but the pesto still works great with lamb.

Not a fan of mint? You can make this with all parsley or try a combination of parsley and cilantro instead. It won’t be traditional lamb-and-mint, but it’s delicious in its own right.

For a spicier version, add one or two fresh jalapeños (seeded if you want less heat) to the pesto. The brightness of the peppers cuts through the richness of the lamb nicely.

If you’re working with grass-fed lamb, be extra careful not to overcook it. Grass-fed meat has less fat and can get dry and tough more quickly than grain-finished options. Check out these grass-fed lamb cooking tips for more guidance on handling leaner cuts.

Making This Recipe Without a Grill

You can absolutely cook these steaks indoors if outdoor grilling isn’t an option. A cast iron skillet or grill pan on your stovetop works well.

Heat the pan over medium-high to high heat until it’s smoking hot. Add a small amount of high-smoke-point oil like avocado or grapeseed oil, then add your steaks.

Cook for 4 to 5 minutes per side, just like on the grill. You won’t get the same smoky flavor, but you’ll still get a great crust and properly cooked meat.

Turn on your exhaust fan or open windows. This method creates a lot of smoke, especially with fattier cuts of meat.

You can also broil these steaks in your oven. Place them on a broiler pan about 4 inches from the heating element and cook for 4 to 5 minutes per side, watching carefully to prevent burning.

Storing and Using Leftovers

Leftover grilled lamb steaks keep well in the fridge for 3 to 4 days. Store them in an airtight container, and keep any extra pesto in a separate container with a thin layer of olive oil on top to prevent browning.

Cold leftover lamb makes fantastic sandwiches. Layer sliced lamb on crusty bread with arugula, sliced tomatoes, red onion, and that mint pesto. Add some crumbled feta if you have it.

You can also chop leftover lamb and toss it with pasta, couscous, or grain bowls. The pesto works as both the sauce and the flavor base.

Reheat gently if you must, but honestly, lamb leg steaks are better eaten cold or at room temperature after the initial cooking. Reheating tends to push them past medium-rare and into tougher territory.

Essential Tools for Success

Beyond the instant-read thermometer I mentioned earlier, a good pair of long-handled tongs makes handling steaks on the grill much easier and safer. Get the ones with a locking mechanism so they’re easier to store.

A quality food processor is essential for making smooth, well-emulsified pesto. A blender can work in a pinch, but you’ll need to stop and scrape down the sides more often, and the texture won’t be quite as good.

A grill brush with stiff bristles (or better yet, a bristle-free design to avoid any loose bristles getting into your food) keeps your grates clean and prevents sticking. You can find bristle-free grill brushes on Amazon that are safer than traditional wire brushes.

A large cutting board with a juice groove around the edges catches all the resting juices and keeps your counter clean. Wood or bamboo boards are gentler on your knife edges than plastic.

Common Mistakes to Avoid

The biggest mistake people make with grilled lamb is cooking it to well-done. Lamb leg steaks get tough and dry when overcooked. Medium-rare to medium is your target zone.

Another common error is not letting the grill get hot enough. Moderate heat gives you gray, steamed meat instead of a proper sear. You need high heat for this recipe to work correctly.

Don’t flip the steaks multiple times. One flip is all you need. Constant flipping prevents proper crust formation and makes it harder to judge doneness accurately.

Skipping the resting period ruins all your hard work. Those juices need time to redistribute through the meat. Cut into a steak immediately after cooking and you’ll see all that precious moisture run out onto your board.

Finally, don’t use dried mint for the pesto. It’s not a substitute for fresh mint in this recipe. The flavor is completely different and much less vibrant. Fresh herbs are essential here.

Pairing This Meal with Drinks

A medium-bodied red wine works beautifully with grilled lamb and mint pesto. Look for something with good fruit but not too much tannin. Côtes du Rhône, Grenache, or a lighter style of Cabernet Franc all pair well.

If you prefer beer, go with something malty and slightly sweet to balance the char on the lamb. A brown ale, amber ale, or even a dark lager complements the flavors without overwhelming the mint.

For a non-alcoholic option, try iced mint tea with a squeeze of lemon. It echoes the mint in the pesto and provides a refreshing contrast to the rich, grilled meat.

Scaling This Recipe for a Crowd

This recipe scales up easily for larger gatherings. The pesto can be made a day or two in advance, which takes pressure off your cooking timeline.

You can grill multiple steaks at once as long as you don’t crowd your grill grates. Leave at least an inch of space between steaks for proper heat circulation and even cooking.

Keep finished steaks warm in a low oven (around 200°F) while you cook subsequent batches. They’ll continue to rest and stay at a good serving temperature without overcooking.

For very large groups, consider slicing all the cooked steaks and arranging them on a big serving platter with the pesto drizzled over top. This makes serving easier and looks impressive.

Why This Recipe Works Better Than Marinating

You might be tempted to marinate these lamb steaks, but I’m telling you it’s not necessary. Leg steaks have plenty of natural flavor, and the high-heat grilling method creates enough crust and char to make things interesting.

Plus, acidic marinades can make the exterior texture mushy if you leave the meat in too long. With thick steaks like these, marinades don’t penetrate very deeply anyway. You’re really only flavoring the surface.

The mint pesto serves as your flavor bomb here. It provides all the herbs, acid, and richness you need without requiring hours of advance prep. Simple seasoning plus high heat plus great sauce equals better results than marinating ever would.

If you’re interested in how different seasonings can enhance grilled meats, this guide to homemade steak seasoning offers useful principles that apply to lamb as well.

Frequently Asked Questions

Can I use lamb loin chops instead of leg steaks?

Yes, but adjust your cooking time. Loin chops are smaller and more tender, so they’ll cook faster. You’re looking at 3 to 4 minutes per side for medium-rare with standard thickness chops. The mint pesto works just as well with chops, and you can find more details about cooking lamb chops for additional guidance.

How do I know if my lamb is fresh?

Fresh lamb should smell clean and slightly sweet, never sour or ammonia-like. The meat should be firm to the touch, not slimy or sticky. The color should be light to medium red with white or cream-colored fat. Check the sell-by date and choose packages from the back of the display case where it’s coldest. According to the USDA guidelines on lamb safety, proper storage and handling are essential for quality and safety.

Can I freeze the mint pesto?

Absolutely. Freeze pesto in ice cube trays, then pop out the frozen cubes and store them in a freezer bag for up to 3 months. Leave out the cheese before freezing and stir it in after thawing for better texture. You can also freeze pesto in small jars or containers, leaving about half an inch of space at the top for expansion. Thaw overnight in the fridge before using.

What if I don’t like the gamey flavor of lamb?

American lamb tends to be milder than imported varieties, so start there. Make sure you’re not overcooking the meat, as that intensifies the stronger flavors. The mint pesto in this recipe specifically helps balance and cut through any gaminess. If you’re still not sold on lamb, you could try this same recipe with thick-cut pork chops or even beef sirloin steaks. The technique and sauce work with other meats too.

Final Thoughts on Grilled Lamb Leg Steaks

This recipe proves that impressive grilled meat doesn’t require complicated techniques or long ingredient lists. Good lamb, high heat, proper timing, and a flavorful sauce are all you need.

Lamb leg steaks deserve more attention from home cooks. They’re flavorful, substantial, and more affordable than premium chops or racks. The mint-pistachio pesto turns them into something special without requiring any fancy skills.

Get your grill hot, don’t overcook the meat, and you’ll have a meal that tastes like it came from an upscale restaurant. Your guests won’t believe how simple it actually was to make.

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