High-Roasted Garlic and Rosemary Leg of Lamb

By AislePrompt Editorial · ·

How this recipe was made — this recipe was drafted by AislePrompt's AI-assisted pipeline from technique templates and USDA-sourced nutrition data, and published by AislePrompt Editorial — see how AislePrompt recipes are developed and reviewed.

A succulent leg of lamb roasted with whole garlic cloves and fragrant rosemary, yielding tender, flavorful slices perfect for a special occasion. This Mediterranean-inspired high-protein recipe, ready in about 115 minutes, pairs bone-in leg of lamb, garlic cloves, fresh rosemary sprigs for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 550 calories and feeds 8, so it slots cleanly into a weekly meal plan and pairs well with a quick salad or grain on the side. Tap "Plan a meal with the AI" below to drop this recipe into your week and send the ingredients straight to Instacart. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 20 min Cook: 95 min Serves 8 Mediterranean cuisine 550 cal/serving
Build a week of meals around this recipe → Shop this recipe on Instacart → Shop equipment ↓

Ingredients

The roasting pan we’d use for this → Best Roasting Pans for 2026: Racks, Handles & Sizes for the Holiday Bird

Affiliate disclosure: AislePrompt may earn a commission on qualifying purchases made through Amazon links, at no additional cost to you. See our policy →

Equipment for this recipe

Top-rated tools to make this recipe successfully.

More Cookware & pots → Shop all kitchen tools →

Instructions

  1. Step 1: Preheat oven to 425°F. With a small knife, make 10 small incisions all over the 5 lb bone-in leg of lamb and insert 10 whole peeled garlic cloves and 4 fresh rosemary sprigs into these slits.
  2. Step 2: Rub the lamb evenly with 3 tbsp olive oil, then sprinkle 2 tbsp kosher salt and 1 tbsp black pepper all over the surface.
  3. Step 3: Place the lamb on a roasting rack in a roasting pan and roast for 20 minutes at 425°F to develop a crust.
  4. Step 4: Reduce oven temperature to 350°F and continue roasting for 1 hour 15 minutes more, or until an internal temperature of 135°F for medium-rare is reached.
  5. Step 5: Remove the lamb from the oven and transfer to a cutting board; tent with foil and rest for 15 minutes.
  6. Step 6: Meanwhile, pour off excess fat from the roasting pan, place over medium heat, add 1/2 cup red wine and 1/2 cup beef broth, scraping up browned bits. Simmer for 5 minutes until slightly reduced.
  7. Step 7: Slice the lamb thinly, serve drizzled with the pan sauce.

Frequently asked questions

How long does High-Roasted Garlic and Rosemary Leg of Lamb take to make?

Total time is about 115 minutes (20 min prep + 95 min cook). Most home cooks find this fits comfortably into a weeknight; double the batch on Sunday for two dinners.

How do I store leftover High-Roasted Garlic and Rosemary Leg of Lamb?

Cool to room temperature within 2 hours, then store in an airtight container in the fridge for up to 4 days. Reheat covered in a 350°F oven for 10-12 minutes, or microwave at 70% power in 60-second bursts to keep bone-in leg of lamb from drying out.

Can I substitute ingredients in High-Roasted Garlic and Rosemary Leg of Lamb?

Yes — most ingredients in this recipe have flexible swaps. For oil, use any neutral high-smoke-point oil (avocado, grapeseed, refined coconut). For aromatics, dried herbs at ⅓ the volume of fresh work in a pinch. The full ingredient list is shoppable on Instacart so you can see substitutes in real time.

How do I scale High-Roasted Garlic and Rosemary Leg of Lamb for a different number of people?

The recipe is written for 8 servings. Multiply each ingredient by (your serving target / 8). Cook time stays roughly the same up to 2x; for 3-4x batches, switch from a skillet to a sheet pan or stockpot so the food isn't crowded — overcrowding steams instead of browns.

What goes well with High-Roasted Garlic and Rosemary Leg of Lamb?

Mediterranean high protein like this pair well with a simple grain (rice, couscous, or crusty bread), a quick salad with acid (lemon vinaigrette, pickled onions), and a pan sauce or yogurt-based dip. Tap "Plan a meal with the AI" to get specific side suggestions.

Related recipes