Slow-Roasted Lamb with Rosemary and Garlic

By AislePrompt Test Kitchen · Reviewed by AislePrompt Editorial · ·

Juicy lamb shoulder slow-roasted with fresh rosemary, garlic, and lemon for a fragrant and tender Mediterranean centerpiece. This mediterranean-inspired lamb ready in about 200 minutes pairs lamb shoulder, bone-in, fresh rosemary sprigs, thinly sliced garlic cloves for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 450 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.

★ 4.2 (15 ratings) Prep: 20 min Cook: 180 min Serves 6 Mediterranean cuisine 450 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 325°F. Using a small knife, make 12 shallow slits all over the 3 lb lamb shoulder and insert 6 thinly sliced garlic cloves and 4 rosemary sprigs into the slits.
  2. Step 2: Rub 1/4 cup extra virgin olive oil, 1 tbsp lemon zest, 2 tsp kosher salt, and 1 tsp black pepper evenly over the entire lamb surface for maximum flavor.
  3. Step 3: Place the lamb in a roasting pan and add 1 cup water to the bottom to keep the meat moist during cooking.
  4. Step 4: Roast in the oven for approximately 3 hours, basting every 45 minutes with the pan juices, until the lamb is fork-tender and internal temperature reaches 190°F.
  5. Step 5: Remove from oven, tent with foil, and rest for 20 minutes before slicing to lock in juices.

Frequently asked questions

How long does Slow-Roasted Lamb with Rosemary and Garlic take to make?

Total time is about 200 minutes (20 min prep + 180 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 Slow-Roasted Lamb with Rosemary and Garlic?

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 lamb shoulder, bone-in from drying out.

Can I substitute ingredients in Slow-Roasted Lamb with Rosemary and Garlic?

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 Slow-Roasted Lamb with Rosemary and Garlic 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 Slow-Roasted Lamb with Rosemary and Garlic?

Mediterranean 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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