Oven-Roasted Lamb with Mint and Rosemary Jus

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Tender lamb leg roasted with fresh mint and rosemary, served with a fragrant jus that highlights classic British flavors. This british-inspired lamb ready in about 95 minutes pairs bone-in lamb leg, fresh rosemary sprigs, chopped fresh mint leaves for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 520 calories and feeds 6, 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.

Prep: 15 min Cook: 80 min Serves 6 British cuisine 520 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 375°F. Rub 4 lbs bone-in lamb leg with 3 tbsp olive oil, 2 tsp salt, 1 tsp black pepper, 4 sprigs chopped fresh rosemary, 1/4 cup chopped fresh mint leaves, and 5 cloves minced garlic, coating evenly.
  2. Step 2: Place the lamb on a roasting rack in a pan and roast for 1 hour 20 minutes, or until an internal temperature of 135°F for medium-rare is reached, basting with pan juices every 20 minutes.
  3. Step 3: Remove lamb from oven, cover loosely with foil, and rest for 15 minutes.
  4. Step 4: Meanwhile, pour 1 cup red wine into the roasting pan and simmer over medium heat, scraping browned bits for 5 minutes.
  5. Step 5: Add 2 cups beef stock to the pan, reduce heat to medium-low, and simmer until the sauce thickens slightly, about 10 minutes.
  6. Step 6: Stir in 2 tbsp butter until melted and sauce is glossy. Serve the lamb sliced with the rosemary-mint jus spooned over.

Frequently asked questions

How long does Oven-Roasted Lamb with Mint and Rosemary Jus take to make?

Total time is about 95 minutes (15 min prep + 80 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 Oven-Roasted Lamb with Mint and Rosemary Jus?

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 lamb leg from drying out.

Can I substitute ingredients in Oven-Roasted Lamb with Mint and Rosemary Jus?

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 Oven-Roasted Lamb with Mint and Rosemary Jus for a different number of people?

The recipe is written for 6 servings. Multiply each ingredient by (your serving target / 6). 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 Oven-Roasted Lamb with Mint and Rosemary Jus?

British lamb 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.

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