Oven-Roasted British Lamb with Rosemary and Garlic

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 drafted and published.

Tender lamb roast infused with fresh rosemary and garlic, slow roasted to juicy perfection, capturing traditional British flavors. This British-inspired lamb recipe, ready in about 90 minutes, pairs bone-in lamb leg, fresh rosemary sprigs, garlic cloves for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 460 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. Nutrition values are approximate, calculated from USDA FoodData Central (fdc.nal.usda.gov) — verify against ingredient labels for any health-driven dietary plan.

Prep: 15 min Cook: 75 min Serves 6 British cuisine 460 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat your oven to 375°F. Finely chop 4 sprigs of fresh rosemary and mince 6 garlic cloves. In a small bowl, combine the rosemary, garlic, 3 tbsp olive oil, 1 tbsp sea salt, 1 tsp black pepper, and 1 tsp lemon zest to create a fragrant paste.
  2. Step 2: Pat dry the 3 lbs bone-in lamb leg with paper towels. Rub the rosemary-garlic paste all over the lamb, ensuring even coverage on all sides. Place the lamb on a rack in a roasting pan.
  3. Step 3: Roast the lamb in the preheated oven for 1 hour and 15 minutes for medium-rare, or until an internal temperature of 135°F is reached. Let rest for 15 minutes before slicing to lock in juices.

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