Roasted Lamb Loin with Rosemary and Garlic

By , Test Kitchen Director · Reviewed by AislePrompt Editorial · ·

Juicy roasted lamb loin infused with fresh rosemary and garlic, roasted to medium-rare perfection for a succulent main course. This mediterranean-inspired lamb ready in about 45 minutes pairs lamb loin, fresh rosemary, garlic cloves for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 480 calories and feeds 4, 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: 30 min Serves 4 Mediterranean cuisine 480 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 400°F. Pat dry 2 pounds lamb loin and make small incisions all over to insert 5 thinly sliced garlic cloves evenly.
  2. Step 2: In a small bowl, mix 3 tbsp olive oil, 2 tbsp chopped fresh rosemary, 1 1/2 tsp sea salt, 1 tsp black pepper, and 1 tsp lemon zest.
  3. Step 3: Rub the herb and oil mixture all over the lamb, coating it thoroughly. Place lamb on a roasting rack in a baking tray.
  4. Step 4: Roast in the preheated oven for 25-30 minutes for medium-rare doneness, or until an internal temperature of 135°F is reached. Let rest 10 minutes before slicing thinly to serve.

Frequently asked questions

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

Total time is about 45 minutes (15 min prep + 30 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 Roasted Lamb Loin 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 loin from drying out.

Can I substitute ingredients in Roasted Lamb Loin 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 Roasted Lamb Loin with Rosemary and Garlic for a different number of people?

The recipe is written for 4 servings. Multiply each ingredient by (your serving target / 4). 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 Roasted Lamb Loin 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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