Slow-Roasted French Herb Lamb Shoulder with Garlic Potatoes

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

Tender lamb shoulder slow-roasted with fragrant herbs and garlic, paired with golden roasted potatoes infused with garlic and rosemary. This french-inspired lamb ready in about 260 minutes pairs bone-in lamb shoulder, divided olive oil, minced, divided garlic cloves for a weeknight-friendly dinner that comes together with one pan and minimal cleanup. Each serving lands at about 550 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: 20 min Cook: 240 min Serves 6 French cuisine 550 cal/serving
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Ingredients

Instructions

  1. Step 1: Preheat oven to 300°F. In a small bowl, mix 2 tbsp olive oil with 3 minced garlic cloves, 1 tbsp chopped rosemary, 1 tbsp chopped thyme, 1 tsp salt, and 1/2 tsp black pepper. Rub this herb-garlic mixture all over the 4 lbs lamb shoulder.
  2. Step 2: Place the lamb on a roasting rack inside a roasting pan and roast in the preheated oven for 4 hours, until the meat is very tender and easily pulls apart with a fork.
  3. Step 3: While the lamb roasts, toss 2 lbs halved baby potatoes with 1 tbsp olive oil, 3 minced garlic cloves, 1 tbsp chopped rosemary, 1 tsp salt, 1/2 tsp black pepper, and 1 tsp lemon zest in a large bowl.
  4. Step 4: After the lamb has roasted for 3 hours, add the potatoes to the roasting pan around the lamb and continue roasting for the final hour. Stir potatoes occasionally to brown evenly.
  5. Step 5: Remove lamb and potatoes from oven. Let lamb rest for 15 minutes before slicing or shredding. Serve potatoes alongside the lamb, garnished with additional fresh thyme if desired.

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Frequently asked questions

How long does Slow-Roasted French Herb Lamb Shoulder with Garlic Potatoes take to make?

Total time is about 260 minutes (20 min prep + 240 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 French Herb Lamb Shoulder with Garlic Potatoes?

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 shoulder from drying out.

Can I substitute ingredients in Slow-Roasted French Herb Lamb Shoulder with Garlic Potatoes?

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 French Herb Lamb Shoulder with Garlic Potatoes 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 French Herb Lamb Shoulder with Garlic Potatoes?

French 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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