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A perfectly roasted boneless leg of lamb on a rustic holiday table, carved slices revealing juicy, medium-rare interior.
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5 from 7 votes

Roast Boneless Leg of Lamb

A tender, herb-crusted boneless leg of lamb roasted hot, finished gently, and carved with ease for an elegant Easter centerpiece.
Prep Time10 minutes
Cook Time30 minutes
Total Time40 minutes
Course: Main Course
Cuisine: American
Keyword: boneless, Easter, leg of lamb
Servings: 8 - 12 servings

Equipment

  • Shallow Roasting Pan with Rackk
  • Food Processor

Ingredients

US Customary - Metric

Instructions

Preheat the Oven

  • Preheat your oven to 450°F.
    Starting hot helps develop a flavorful crust on the outside of the lamb before you lower the temperature for even roasting.

Prepare the Herb Mixture

  • Finely chop the rosemary, thyme, oregano, and garlic. You can do this by hand for a rustic texture or pulse briefly in a food processor.
    Tip: Do not over-process into a paste unless that is your preference. A slightly coarse chop gives better texture and flavor distribution.

Prepare the Lamb

  • Remove the lamb from the refrigerator about 30 to 45 minutes before roasting so it can take the chill off. Pat it dry with paper towels.
    Tip: Dry meat browns better. Moisture is the enemy of crust.
  • Rub the lamb lightly on all sides with olive oil, then season generously with salt and freshly ground black pepper.

Apply the Herbs

  • Spread the chopped herb and garlic mixture evenly over the top and sides of the lamb, pressing gently to help it adhere. If your roast is tied with netting or butcher’s twine, leave it in place for even cooking.

Roast at High Heat

  • Place the lamb on a rack in a shallow roasting pan, fat side up if there is one. Roast at 450°F for 25 to 30 minutes to develop color.

Reduce Heat & Finish Roasting

  • Lower the oven temperature to 375°F without opening the door for long. Continue roasting until the internal temperature reaches your desired doneness:
    125°F for rare
    130–135°F for medium rare
    140–145°F for medium
    Tip: Use an instant-read thermometer inserted into the thickest part. Boneless lamb cooks evenly, but temperature is still your best guide.

Rest the Roast

  • Transfer the lamb to a carving board and loosely tent with foil. Let it rest for 10 to 15 minutes. The internal temperature will rise slightly, and the juices will redistribute.
    Tip: Cutting too soon lets those flavorful juices run onto the board instead of staying in the meat.

Make the Pan Sauce (Optional but Recommended)

  • While the lamb rests, pour the pan juices into a saucepan. Skim excess fat if necessary.
  • Add 1 cup demi-glace and any herbs that fell off during roasting. Simmer gently until the sauce reduces and thickens enough to coat the back of a spoon.
  • For a smoother presentation, strain the sauce before serving.
    Tip: Straining removes excess garlic and herb bits, giving the sauce a more refined finish.

Carve & Serve

  • Remove the netting or twine. Slice the lamb against the grain into even slices and serve with the warm pan sauce spooned over the top or on the side.

Notes

We didn't do this, but I bet a couple of tablespoons of mint jelly added to this sauce would be incredible.