Herb-Roasted Lamb Backstrap with Garlic and Rosemary

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

Succulent lamb backstrap roasted with fresh garlic and rosemary, creating an aromatic and tender centerpiece perfect for special occasions. This mediterranean-inspired lamb (low carb) ready in about 50 minutes pairs lamb backstrap (loin), trimmed, fresh rosemary, chopped, garlic cloves, minced for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 520 calories and feeds 4, so it slots cleanly into a low-carb week and pairs well with cauliflower rice or roasted green vegetables. 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: 30 min Serves 4 Mediterranean cuisine 520 cal/serving
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Ingredients

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Instructions

  1. Step 1: Preheat oven to 400°F. In a small bowl, combine 3 tbsp olive oil, 4 minced garlic cloves, 2 tbsp chopped fresh rosemary, 1 1/2 tsp sea salt, 1 tsp black pepper, and 1 tsp lemon zest to form a herb paste.
  2. Step 2: Rub the herb mixture evenly over 2 lbs trimmed lamb backstrap. Let rest at room temperature for 15 minutes.
  3. Step 3: Place lamb on a roasting rack in a baking tray and roast for 20-25 minutes for medium-rare, or until internal temperature reaches 135°F.
  4. Step 4: Remove lamb from oven and tent loosely with foil. Let rest for 10 minutes before slicing thinly against the grain.
  5. Step 5: Optional: while lamb rests, pour 1/2 cup red wine into the roasting tray and simmer over medium heat for 3-4 minutes, scraping browned bits to make a quick pan sauce to serve alongside.

Frequently asked questions

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

Total time is about 50 minutes (20 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 Herb-Roasted Lamb Backstrap with Garlic and Rosemary?

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 fresh rosemary, chopped from drying out.

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

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 Herb-Roasted Lamb Backstrap with Garlic and Rosemary 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.

Is Herb-Roasted Lamb Backstrap with Garlic and Rosemary low carb?

Yes — this recipe is tagged low carb based on its ingredient list. Always cross-check labels for packaged ingredients (sauces, broths, condiments) since formulations vary by brand.

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