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  1. Home
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  3. Slow-Roasted Leg of Lamb
Main Course
Holiday
Make Ahead
High Protein
Low Carb
Low Sugar
Keto
23 April 2025

Slow-Roasted Leg of Lamb

RecipeShare Test Kitchen

Slow-Roasted Leg of Lamb

A flavorful, fall-apart tender leg of lamb slow-roasted with garlic, herbs, and vegetables. Includes optional fresh mint sauce.

Browse Meal Plan Library

When you’re feeding a crowd or celebrating a special occasion, a slow-roasted leg of lamb is an unbeatable choice. Tender, flavorful, and practically falling off the bone, this recipe is a make-ahead dream that lets your oven do the heavy lifting.


Why You'll Love This

  • Fall-apart tender: Four hours of slow roasting turns the lamb meltingly soft.
  • Fragrant and herby: A garlic, rosemary, and thyme marinade infuses every bite.
  • Minimal hands-on time: The oven takes care of most of the work.

🧄 Marinate for Maximum Flavor

The key to this recipe is giving the lamb enough time to absorb all the aromatic herbs and garlic. Ideally, marinate the lamb the night before. If you're short on time, even 4 hours will work wonders.

💡 Tip: For extra depth, use a mortar and pestle to crush the garlic with the herbs and salt before mixing in the olive oil.


🔥 Slow Roast Method

After marinating, let the lamb come to room temperature while you prepare the roasting tray. Scatter carrots, onions, and whole garlic cloves at the bottom for a built-in side dish and flavor base. Pour in chicken stock for moisture and nestle the lamb on top. Cover tightly with foil and let it slow-roast to perfection.

Near the end, uncover and baste the lamb to get that irresistible golden-brown finish.


🌡️ Internal Temperature Guide

Depending on how you like your lamb, aim for these internal temps:

  • 60–65°C – Medium (slightly pink)
  • 70–75°C – Well-done and tender
  • 80°C+ – Ultra tender, falling off the bone

Always rest the meat for at least 30 minutes before carving—this keeps the juices where they belong.


🍃 Bonus: Fresh Mint Sauce

Lamb and mint are a timeless duo. This fresh mint sauce is simple to whip up and adds brightness to the rich roast.

It’s as easy as combining mint, vinegar, sugar, and a splash of boiling water. Let it sit for at least 15 minutes to develop the flavor.


🥗 Serving Suggestions

Serve your slow-roasted lamb with:

  • Roasted potatoes or creamy mash
  • Steamed green beans or peas
  • Crusty bread to soak up the juices

And don’t forget the mint sauce!


🧽 Clean-up Tip

After roasting, the pan will have lots of flavorful juices. Pour them into a saucepan and simmer to concentrate into a quick gravy—or just drizzle directly over carved slices.


🙌 Make It Your Own

Feel free to experiment with spices in the marinade. A touch of ground cumin or smoked paprika adds a different dimension. If you're making this for Easter or a holiday, pair with spring vegetables or a bright lemony salad to balance the richness.

Slow-Roasted Leg of Lamb

RecipeShare Test Kitchen

A flavorful, fall-apart tender leg of lamb slow-roasted with garlic, herbs, and vegetables. Includes optional fresh mint sauce.

Slow-Roasted Leg of Lamb image
Main Course
Holiday
Make Ahead
High Protein
Low Carb
Low Sugar
Keto
Prep Time
20 mins
Cook Time
270 mins
Total Time
290 mins
Servings
8

Chef's Tips

  • Let the lamb rest for 30 minutes before carving for best texture.

  • Marinate overnight for maximum flavor.

Tools Used

Roasting TinOvenKnife(opens in a new tab)Foil(opens in a new tab)

We use affiliate links, which may earn us a small commission at no extra cost to you.

Ingredients

USMetric

Main Lamb Roast

Fresh Mint Sauce (optional)

Instructions

Marinade

  1. 1

    Mix olive oil, minced garlic, rosemary, thyme, and 1 tsp salt in a bowl.

  2. 2

    Rub mixture all over lamb and refrigerate, covered or in a zip bag, for at least 4 hours or overnight.

Roasting

  1. 1

    Remove lamb from fridge 1 hour before roasting.

  2. 2

    Preheat oven to 160°C.

  3. 3

    Scatter carrots, onions, and whole garlic cloves in a roasting tin.

  4. 4

    Pour chicken stock into base of the tin.

  5. 5

    Place lamb on top of the vegetables.

  6. 6

    Season with an additional ½ tsp salt and ½ tsp pepper.

  7. 7

    Cover tightly with foil.

  8. 8

    Roast for 4 hours.

  9. 9

    45 minutes before serving, remove foil and baste lamb.

  10. 10

    Return lamb to oven uncovered for 30–40 minutes to brown.

Resting and Serving

  1. 1

    Let lamb rest for 30 minutes, loosely covered with foil before carving.

Fresh Mint Sauce

  1. 1

    Finely chop mint leaves.

  2. 2

    Dissolve sugar and salt in boiling water.

  3. 3

    Stir in vinegar and chopped mint.

  4. 4

    Let infuse for at least 15 minutes before serving.

Comments & Reviews

  • Anita D.

    4/27/2025

    Used a boneless leg and adjusted the timing a bit—still came out beautifully. Great recipe for a special occasion.

  • George H.

    4/27/2025

    I didn't have mint, so I skipped the sauce—but the lamb itself was spectacular. Super tender and flavorful. Will definitely make again.

  • Laura K.

    4/26/2025

    I prepped this the night before and it made cooking for guests so much easier. Resting the lamb really helped lock in the juices. A keeper!

  • Daniel R.

    4/26/2025

    Roasting low and slow really does make a difference. The meat was juicy and infused with garlic and herbs. Everyone went back for seconds!

  • Sarah M.

    4/25/2025

    This turned out absolutely perfect for Easter lunch! The lamb was fall-apart tender and full of flavor. That mint sauce was a lovely touch—so refreshing.

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Nutrition Facts

Serving Size: 1 slice (approx. 250g)

Calories 430
% Daily Value*
Total Fat 30g38%
Saturated Fat 12g60%
Trans Fat 0g
Cholesterol 110mg37%
Sodium 420mg18%
Total Carbohydrates 4g1%
Dietary Fiber 1g4%
Sugars 1g
Protein 38g

* Percent Daily Values are based on a 2,000 calorie diet. Your daily values may be higher or lower depending on your calorie needs.

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