Description
This Slow Roasted Boneless Leg of Lamb recipe delivers a tender, juicy, and flavor-packed dinner perfect for special occasions or family gatherings. The lamb is coated with a fragrant herb mixture, slow-roasted with aromatic onions and a splash of wine or broth, resulting in a beautifully crusted yet melt-in-your-mouth centerpiece.
Ingredients
Scale
Herb Mixture
- 6 garlic cloves, minced
- 3 tablespoons fresh rosemary, finely chopped
- 2 tablespoons fresh thyme leaves
- 2 tablespoons fresh oregano (or 2 teaspoons dried)
- 1 tablespoon lemon zest
- 2 tablespoons breadcrumbs (optional, for extra texture)
Lamb and Seasoning
- 1 boneless leg of lamb (4-5 pounds), trimmed and tied
- 3 tablespoons extra virgin olive oil
- 2 tablespoons Dijon mustard
- 1 tablespoon kosher salt
- 1 teaspoon freshly ground black pepper
Roasting Setup
- 2 large onions, sliced thick
- 1 cup dry white wine or beef broth
- 2 bay leaves
Instructions
- Prepare the Herb Mixture: In a small bowl, combine minced garlic, chopped rosemary, thyme, oregano, lemon zest, and breadcrumbs (if using). Mix thoroughly to ensure even distribution of herbs and flavors.
- Season and Coat the Lamb: Pat the lamb dry with paper towels to remove moisture. Rub the entire surface with Dijon mustard to help the herb mixture stick and add tang. Massage olive oil into the lamb, then generously coat with kosher salt, black pepper, and the prepared herb mixture. Press the seasonings firmly into the meat for a good crust.
- Rest and Bring to Room Temperature: Wrap the seasoned lamb tightly in plastic wrap and refrigerate for at least 2 hours or overnight for enhanced flavor. Remove from the fridge 1 hour before roasting to allow the meat to come to room temperature for even cooking.
- Prepare the Roasting Setup: Preheat the oven to 325°F (163°C). Arrange the thickly sliced onions at the bottom of a roasting pan; they act as a natural rack and impart sweetness to the pan juices. Pour the white wine or beef broth around the onions without pouring over them. Add bay leaves to the liquid.
- Begin the Slow Roast: Place the lamb fat-side up on top of the onions in the roasting pan. Roast low and slow for about 20 minutes per pound, aiming for an internal temperature of 130°F for medium-rare doneness.
- Monitor and Baste: Check the lamb every 45 minutes, basting it with pan juices to maintain moisture and enhance flavor. If the herb crust starts to brown too quickly, tent the lamb loosely with foil to prevent burning while continuing the slow roast.
- Rest Before Carving: Once the lamb reaches desired doneness, remove it from the oven and tent with foil. Let it rest for 15-20 minutes to allow the juices to redistribute, ensuring tender, juicy slices when carved.
Notes
- For best flavor, refrigerate the lamb overnight after seasoning.
- Use a meat thermometer to accurately monitor the internal temperature.
- Resting the meat is essential to keep it juicy and tender.
- Breadcrumbs are optional but add a nice texture to the herb crust.
- Adjust cooking time based on the weight and desired doneness.
- If white wine is not available, beef broth is a good substitute for roasting liquid.
