This Roasted Boneless Leg of Lamb recipe is a classic and elegant dish perfect for special occasions or a hearty family meal. The combination of garlic, rosemary, and perfectly roasted lamb creates a flavorful and tender centerpiece.

Why You’ll Love This Recipe

  • Flavorful: The garlic and rosemary infuse the lamb with a rich, aromatic flavor.
  • Tender and Juicy: Roasting the lamb to the correct internal temperature ensures a tender and juicy result.
  • Versatile: Can be served with a variety of side dishes, and leftovers are great in sandwiches or salads.
  • Impressive: This dish makes a stunning presentation for any gathering.

Ingredients

Boneless Leg of Lamb Roast

  • Boneless leg of lamb: The main protein source.
  • Garlic cloves: Adds a pungent and aromatic flavor.
  • Olive oil: Used for rubbing the roast and adding moisture.
  • Dried rosemary: Provides a fragrant and herbaceous flavor.
  • Salt and ground black pepper: Enhances the overall flavor.

Roasted Potatoes (Optional)

  • Potatoes: Cubed, provides a hearty side dish.
  • Carrots: Sliced, adds sweetness and texture.
  • Garlic powder: Adds a concentrated garlic flavor.
  • Salt and ground black pepper: Enhances the overall flavor.

Note: You’ll find the complete list of ingredients, along with their exact measurements, in the printable recipe card at the bottom of this post.

How to Make Roasted Boneless Leg of Lamb

  • Prepare the Lamb:
    • Preheat oven to 425°F (220°C).
    • Make small incisions in the lamb and insert garlic slivers.
    • Rub the lamb with olive oil, rosemary, salt, and pepper.
  • Roast the Lamb:
    • Place the lamb in a roasting pan or Dutch oven.
    • Roast until the desired internal temperature is reached.
    • Use a meat thermometer to check for doneness.
  • Rest the Lamb:
    • Remove the lamb from the oven and let it rest for 15 minutes.
    • Remove the casing from the lamb.
  • Slice and Serve:
    • Slice the lamb against the grain and serve warm.

Roast Potatoes (Optional)

  • Prepare the Potatoes:
    • Scoop out some of the fat and drippings from the roasting pan.
    • Add potatoes, carrots, garlic powder, salt, and pepper.
  • Roast the Potatoes:
    • Bake at 450°F (230°C) for about 35 minutes, or until tender.

Pro Tips for Making the Recipe

  • Use a Meat Thermometer: This is crucial for ensuring the lamb is cooked to the correct temperature.
  • Don’t Remove the Casing: Keep the netting or rope on the lamb during cooking to prevent it from falling apart.
  • Let the Lamb Rest: Resting the lamb allows the juices to redistribute, resulting in a more tender and juicy roast.
  • Adjust Cooking Time: Oven temperatures can vary, so check the internal temperature frequently towards the end of cooking.
  • Make Ahead: You can stuff and season the roast ahead of time and refrigerate it for up to 24 hours.

How to Serve

  • With Roasted Vegetables: Serve with the roasted potatoes and carrots from the recipe, or other roasted vegetables like asparagus or Brussels sprouts.
  • With Mashed Potatoes or Grains: Pair with creamy mashed potatoes, rice, or quinoa.
  • With a Side Salad: Serve with a fresh green salad for a balanced meal.
  • In Sandwiches or Salads: Use leftover lamb in sandwiches or salads for a delicious and easy meal.

Make Ahead and Storage

  • Make Ahead: Prepare the lamb by stuffing and seasoning it, then refrigerate for up to 24 hours before roasting.
  • Storage: Refrigerate leftover lamb in an airtight container for up to 5 days.
  • Freezing: Freeze leftover lamb sliced or cut into bite-sized pieces in an airtight container for up to 3 months. Thaw in the refrigerator.

FAQs

  • What is the best internal temperature for lamb?
    • Medium-rare: 130-135°F (54-57°C)
    • Medium-well: 140-145°F (60-63°C)
    • Well-done: 150-155°F (66-68°C)
  • Can I use fresh rosemary instead of dried?
    • Yes, you can use fresh rosemary. Use about 1 tablespoon of fresh rosemary for every 1 teaspoon of dried rosemary.
  • Can I add other herbs or spices?
    • Yes, you can add other herbs and spices like thyme, oregano, or garlic powder.
  • Can I use a different type of potatoes?
    • Yes, you can use any type of potatoes, such as red potatoes, Yukon Gold potatoes, or sweet potatoes.
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Roasted Boneless Leg of Lamb Recipe

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  • Author: Evelyn
  • Prep Time: 10 minutes
  • Cook Time: 1 hour 30 minutes
  • Total Time: 1 hour 40 minutes
  • Yield: 8 servings 1x
  • Category: Main-course
  • Method: Roasting

Description

This Roasted Boneless Leg of Lamb is a flavorful and tender centerpiece for any special occasion. Infused with garlic and rosemary, and roasted to your desired doneness, it’s a simple yet elegant dish that’s sure to impress.


Ingredients

Units Scale

Boneless Leg of Lamb Roast:

  • 45 pounds boneless leg of lamb
  • 57 large garlic cloves, cut into slivers
  • 2 tablespoons extra virgin olive oil
  • 2 tablespoons dried rosemary
  • 1 1/4 teaspoons salt
  • Ground black pepper, to taste

Roasted Potatoes After (Optional):

  • 2 pounds potatoes, cubed
  • 2 large carrots, sliced
  • 1/2 tablespoon garlic powder
  • 3/4 teaspoon salt
  • Ground black pepper

Instructions

  1. Preheat Oven: Preheat oven to 425°F (220°C).
  2. Prepare Lamb: In a roasting pan or Dutch oven, place lamb. Make 20-30 inserts with a paring knife. Stick garlic slivers into each opening.
  3. Season Lamb: Rub roast with olive oil. Sprinkle one side with half of the rosemary, salt, and pepper. Turn and repeat on the other side.
  4. Roast Lamb: Bake uncovered until desired doneness:
    • Medium Rare: 130-135°F (54-57°C) internal temperature – about 16 minutes/pound.
    • Medium Well: 140-145°F (60-63°C) internal temperature – about 18 minutes/pound.
    • Well-Done: 150-155°F (66-68°C) internal temperature – about 20 minutes/pound.
  5. Check Temperature: For a 4-5 pound roast, check internal temperature after 1 hour. For a 2-3 pound roast, check after 45 minutes.
  6. Rest Lamb: Remove lamb from oven and let rest uncovered for 15 minutes.
  7. Remove Casing: Remove and discard the casing.
  8. Slice and Serve: Slice lamb into 1/4 inch slices against the grain. Serve warm.

Roast Potatoes in Fat Drippings (Optional):

  1. Prepare Drippings: Scoop out 1 cup of fat and drippings from the pan, leaving the rest.
  2. Add Vegetables: Add potatoes, carrots, garlic powder, salt, and pepper. Stir well.
  3. Roast Vegetables: Bake at 450°F (230°C) for about 35 minutes or until fork-tender.

Notes

  • Make Ahead: Stuff and season roast, cover, and refrigerate for 24 hours. Let come to room temperature before roasting.
  • Store: Refrigerate roast whole or sliced in an airtight container for up to 5 days.
  • Freeze: Freeze leftovers sliced or cut into bite-sized pieces in an airtight container for up to 3 months. Thaw in the refrigerator.
  • Keep Casing On: Do not remove the casing before cooking; it holds the meat together.
  • Adjust for Oven: Check with an internal meat thermometer 1/2 hour before the end of cooking time.
  • Resting: Internal temperature will rise while meat is resting.

Nutrition

  • Serving Size: 1 serving
  • Calories: 175 kcal
  • Sugar: 1g
  • Sodium: 362 mg
  • Fat: 8g
  • Saturated Fat: 2g
  • Unsaturated Fat: 6g
  • Trans Fat: 73g
  • Carbohydrates: 7g
  • Fiber: 1g
  • Protein: 1g
  • Cholesterol: 24mg

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