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Roasted Leg of Lamb with Garlic, Rosemary, and Thyme Recipe

4.1 from 42 reviews

A classic and flavorful roasted leg of lamb seasoned with garlic, fresh rosemary, thyme, and Dijon mustard, perfect for a special occasion or family dinner. This recipe delivers a tender, juicy lamb roast with a beautifully herb-infused crust.

Ingredients

Scale

Leg of Lamb

  • 1 (5 pound) bone-in leg of lamb (trimmed)

Seasoning Mixture

  • 4 cloves garlic (minced)
  • 1 tablespoon olive oil
  • 1 tablespoon chopped fresh rosemary
  • 1 tablespoon chopped fresh thyme leaves
  • 1 tablespoon Dijon mustard
  • 1 tablespoon kosher salt
  • 2 teaspoons ground black pepper

Instructions

  1. Preheat Oven: Preheat your oven to 350 degrees F (175 degrees C) and line a shallow roasting pan with aluminum foil for easier cleanup.
  2. Prepare the Lamb: Pat the leg of lamb dry thoroughly using paper towels. Using a sharp knife, score the fat side of the lamb by making shallow cuts in a diamond pattern to help the marinade penetrate.
  3. Make Seasoning Mixture: In a small bowl, mix together the minced garlic, olive oil, chopped rosemary, thyme leaves, Dijon mustard, kosher salt, and ground black pepper until well combined.
  4. Apply Seasoning: Place the leg of lamb fat side up on a rack in the prepared roasting pan. Spread the garlic and herb mixture evenly over the lamb, rubbing it thoroughly into the scored cuts to infuse the flavor deeply.
  5. Roast the Lamb: Place the roasting pan in the oven and cook the lamb until it reaches an internal temperature of 135 degrees F for medium doneness, which should take approximately 1 hour 30 minutes to 1 hour 45 minutes depending on your oven and the meat’s thickness.
  6. Rest the Meat: Remove the lamb from the oven and let it rest for 15 minutes before slicing. This allows the juices to redistribute and results in a moist, tender roast.
  7. Serve: Slice the lamb and serve immediately, ideally paired with mini hasselback potatoes or your favorite side dishes.

Notes

  • Allow the lamb to come to room temperature before roasting for even cooking.
  • Use a meat thermometer to ensure accuracy in cooking doneness.
  • Resting the meat is crucial to keep it juicy and tender.
  • For a more intense flavor, marinate the lamb with the herb mixture overnight in the refrigerator.
  • Adjust seasoning according to your taste preferences; reduce salt if preferred.
  • Leftovers can be stored in the refrigerator for up to 3 days.

Keywords: roasted leg of lamb, garlic lamb roast, herb crusted lamb, Mediterranean lamb recipe, oven roasted lamb