At a Glance
- Dish: Garlic and herb stuffed boneless leg of lamb, rolled and oven roasted
- Flavor Profile: Garlic-forward with fresh rosemary and thyme over savory lamb
- Method: Butterflied lamb rolled with herb rub, then roasted
- Key Technique: High heat starts the crust; finishing at a lower temperature ensures even doneness
- Servings: 6 to 8 (estimate based on size—adjust if needed)
- Total Time: 2 hours
- Effort Level: Moderate
A Simple Way to Serve a Crowd
A boneless leg of lamb is a practical way to serve a group with very little last-minute fuss. Butterflying, seasoning, and rolling the meat creates a uniform shape that cooks evenly while allowing the garlic and herb mixture to flavor the roast throughout.
This method uses a two-stage roasting approach for better control. Starting at a higher temperature develops a well-browned exterior, then lowering the heat ensures the interior cooks evenly. Holding the outer layer of the herb rub until after the initial roast prevents scorching and keeps the garlic and herbs balanced rather than bitter.
Ingredient Notes
We believe that great flavor starts with quality ingredients. Here are the small details that make these choices work. For a full list and measurements, see the recipe card below.
- Boneless leg of lamb – Look for a roast that’s evenly butterflied and not overly trimmed. A thin layer of fat (about 1/8-inch) helps keep the meat moist and adds flavor as it roasts. American lamb is typically milder in flavor, while Australian lamb (usually grass-fed) has a slightly more pronounced taste. Both work well for this recipe. Pre-packaged lamb is often wrapped in netting to hold its shape – remove this before seasoning. If buying from a butcher, ask them to trim excess fat and leave the roast untied for easier seasoning.
- Herb and garlic rub – This mixture of olive oil, minced garlic, rosemary, thyme, parsley, and salt is used both inside and outside the roast to build layered flavor. For the best result, use fresh herbs as their aroma and texture hold up better during roasting. Combining fresh herbs with oil and salt is a versatile foundation you can use for everything from roasted chicken to pork chops.
A Quick Look at How to Make:
How to Make Roasted Boneless Leg of Lamb
Here’s a quick overview of the process, with the key techniques that make it work. Detailed, step-by-step instructions are in the printable recipe card below.
Preparing this boneless leg of lamb is all about building flavor from the inside out and using a two-step roasting method to keep the meat tender.
Once the lamb is trimmed of excess fat, the herb rub is spread over the interior surface before rolling. This step ensures the garlic and fresh herbs permeate the meat as it cooks, rather than just sitting on the outside.
Rolling and tying the lamb into a compact cylinder helps it cook more evenly and makes it easier to carve. Tying it at regular intervals so it holds its shape without bulging helps promote consistent doneness from end to center.
Make-ahead note: This roast can be prepared up to this point a day in advance. See the recipe notes for details.
Starting the lamb in a hot oven gives the exterior a chance to brown lightly, adding depth of flavor. After that initial blast of heat, the temperature is reduced so the interior cooks more gently and evenly.
To avoid overcooking, begin checking the internal temperature early, inserting an instant-read thermometer into the thickest part of the roast. Pulling the lamb at the right moment is key, as it will continue to cook after it comes out of the oven.
To ensure that the roast stays moist and tender, let it rest before slicing to allow the juices to redistribute and the temperature to rise a bit more.
Boneless Leg of Lamb FAQs
When roasting a boneless leg of lamb, timing, temperature, and resting make the difference between a good result and a great one. Use this quick guide as a reference while you cook.
How much boneless leg of lamb per person?
Plan on 1/2 pound per person. Most boneless legs of lamb weigh between 4 and 5-1/2 pounds before trimming and will serve 8 to 10 people.
How long does it take to cook a boneless leg of lamb?
Roasting time is about 12 to 15 minutes per pound for medium-rare doneness. It’s important to rely on internal temperature rather than roasting time alone.
What temperature should boneless leg of lamb be cooked to?
Aim for medium-rare or medium for the best balance of flavor and texture. Use an instant-read thermometer in the thickest part of the roast and remove the roast from the oven as follows:
- Medium-rare: 125°F
- Medium: 130°F
- Medium-well: 135°F
Do you need to rest boneless leg of lamb before carving?
Rest the roast for 15 to 20 minutes before slicing. This gives the juices time to redistribute throughout meat and allows for carryover cooking, where the internal temperature will rise 5 to 10 degrees.
A Fresh Spring Menu to Serve with Roasted Lamb
Although this roast works well year-round, its garlic and herb seasoning is inspired by traditional Italian Easter preparations. If you’re planning a spring lamb dinner, start with Mushroom Puffs, a flaky puff pastry appetizer filled with a savory, cheesy mushroom mixture, followed by Risotto Primavera, a spring risotto with pancetta, peas, and white wine. For a simple side, Lemon Roasted Asparagus adds a bright, buttery contrast, and to finish, Italian Ricotta Pie offers a smooth, lightly citrusy dessert that rounds out the menu.
Herb Roasted Boneless Leg of Lamb
Ingredients
- 1 4 to 5-1/2 lb boneless leg of lamb
- Salt and freshly ground black pepper
Herb rub:
- 6 tablespoons extra-virgin olive oil
- 1/2 teaspoon salt
- 3 cloves garlic, minced
- 2 tablespoons finely chopped fresh rosemary
- 2 tablespoons finely chopped fresh thyme
- 1/4 cup finely chopped fresh parsley
Instructions
- Remove the lamb from the refrigerator and let it rest at room temperature for 30 minutes.
- Preheat the oven to 425°F. Lightly coat a roasting pan and rack with nonstick spray.
- Next, make the rub. In a small bowl, combine the olive oil, salt, garlic, rosemary, thyme, and parsley. Mix well and set aside.
- Lay the lamb flat, fatty side up. Trim any thick surface fat to about 1/8-inch. Turn the lamb over and remove any large pieces of fat or tough connective tissue, being careful to keep the meat in one piece.
- Cover the lamb with plastic wrap and gently pound the thicker areas with a meat mallet to create a more even thickness. Season both sides generously with salt and pepper.
- Spread about two-thirds of the herb mixture over the inside (cut side) of the lamb. Roll it into a cylinder and position it seam-side down, then reshape as needed.
- Using kitchen twine, tie the lamb crosswise at 1-inch intervals. Tuck in the ends and secure them with a lengthwise piece of twine, weaving it through the cross ties.
- Add about 1/2 inch of water to the roasting pan. Place the lamb on the rack and roast for 15 minutes at 425°F.
- Remove the lamb from the oven and reduce the temperature to 375°F. Spread the remaining herb mixture over the outside of the roast, then return it to the oven.
- Roast until the internal temperature reaches 125°F for medium-rare, 130°F for medium. Begin checking after 40 to 45 minutes to avoid overcooking.
- Transfer the lamb to a cutting board and let it rest for at least 15 minutes.
- Remove the twine and carve the lamb into 1/2-inch thick slices.
Notes
You can prepare, roll, and tie the lamb a day in advance (wait to apply the exterior rub). Place it on a tray, cover loosely, and refrigerate. Remove from the refrigerator about 1 hour before roasting to bring it to room temperature. The herb mixture benefits from the extra time, allowing the flavors to penetrate the meat more fully.
Nutrition
Nutrition information is automatically calculated, so should only be used as an approximation.
This recipe was originally created by Lynne Webb for ZEST Digital Magazine in April of 2013 and first published on My Gourmet Connection in March of 2017.
I made this last weekend when friends came in from out of town and everyone loved it. The flavors were perfect. Thanks!!