This Herb Roasted Leg of Lamb is a stunning centerpiece roast featuring a bone-in leg generously studded with garlic and coated in a fragrant paste of fresh rosemary, thyme, parsley, lemon, and olive oil. Seared at high heat for a beautifully caramelized crust, then slow-roasted to a juicy, pink medium-rare, this recipe delivers restaurant-quality results with straightforward technique. Perfect for Easter, holiday feasts, or any special Sunday dinner, it comes together with pantry staples and produces incredible pan drippings for a simple, deeply flavorful jus.
Large roasting pan with rack At least 13x16 inches; rack lifts lamb for even heat circulation
Instant-read meat thermometer Essential for checking doneness accurately
Sharp paring knife For scoring slits in the lamb
Cutting board
Small mixing bowl For making the herb paste
Aluminum foil For tenting the lamb during rest
Basting brush or spoon For basting lamb with pan drippings
Tongs
Large carving knife and fork For carving the rested roast
Fat separator or gravy strainer For skimming fat from pan drippings to make jus
Ingredients
For the Lamb
1bone-in leg of lambabout 5–6 lbs (2.3–2.7 kg)
6clovesgarlicthinly sliced
For the Herb Paste
3tablespoonsextra virgin olive oil
2tablespoonsfresh rosemary leavesfinely chopped
1tablespoonfresh thyme leaves
1tablespoonfresh flat-leaf parsleyfinely chopped
1teaspoondried oregano
1lemonzested and juiced
1½teaspoonskosher salt
1teaspoonfreshly ground black pepper
½teaspoonred pepper flakesoptional, for heat
For the Roasting Pan
1cupdry white wine240ml; or substitute chicken broth
1cupchicken or lamb broth240ml
1largeonionroughly chopped
2carrotsroughly chopped
3sprigsfresh rosemaryfor the roasting pan
Instructions
Remove the leg of lamb from the refrigerator 45 minutes to 1 hour before cooking and pat it completely dry with paper towels. Preheat your oven to 450°F (230°C) with the rack in the lower third.
In a small bowl, combine the olive oil, chopped rosemary, thyme, parsley, dried oregano, lemon zest, lemon juice, salt, pepper, and red pepper flakes. Stir into a rough, fragrant paste.
Using a paring knife, cut 20–25 slits about 1 inch deep all over the lamb. Push a thin slice of garlic into each slit, distributing all 6 cloves evenly across the meat.
Rub the herb paste all over the lamb, coating both sides and working it into every crevice. For deeper flavor, cover and refrigerate for up to 24 hours, then bring back to room temperature before roasting.
Scatter the chopped onion, carrots, and rosemary sprigs in the roasting pan, then pour in the white wine and broth. Set the rack inside the pan and place the lamb fatty-side up on the rack.
Roast uncovered at 450°F (230°C) for 20 minutes to caramelize the herb crust. Do not open the oven during this time.
Lower the oven to 350°F (175°C) and continue roasting, basting with pan drippings every 30 minutes, for 1 hour to 1 hour 30 minutes until the desired internal temperature is reached. Add a splash of broth if the pan looks dry.
Insert a thermometer into the thickest part of the lamb away from the bone. Pull at 125°F (52°C) for rare, 130–135°F (54–57°C) for medium-rare, or 140–145°F (60–63°C) for medium — the lamb will rise 5–10°F while resting.
Transfer the lamb to a cutting board and tent loosely with foil. Rest for 20 minutes before carving so the juices redistribute throughout the meat.
Strain the pan drippings into a small saucepan, skim the fat, and simmer to taste for a simple jus. Carve the lamb in long slices parallel to the bone and serve with the pan sauce.
Notes
Bring to room temperature: Always let the lamb sit out for 45–60 minutes before roasting for more even cooking from edge to center.
Marinate overnight: Applying the herb paste the night before and refrigerating uncovered deepens flavor significantly and is highly recommended.
Use a thermometer: Internal temperature is the only reliable way to gauge doneness — guessing leads to overcooked lamb.
Medium-rare is ideal: 130–135°F after resting gives pink, juicy, tender slices. Well-done lamb (155°F+) can be tough and dry.
Fresh herbs are essential: Dried rosemary and thyme won't produce the same vibrant, fragrant crust. Use fresh whenever possible.
Keep pan liquid topped up: If the drippings are burning, add a splash of broth or water to prevent a bitter sauce.
Boneless option: Use a butterflied boneless leg, apply the same paste, roll and tie with twine. Check temperature earlier — around 45 minutes after the initial sear.
Storage: Refrigerate carved lamb in an airtight container with a splash of pan jus for up to 4 days, or freeze for up to 3 months.
Reheating: Warm slices covered with foil at 325°F (165°C) with a few tablespoons of broth for 15–20 minutes, or reheat gently in a covered skillet over low heat.
Leftover idea: Cold sliced lamb in pita bread with tzatziki and cucumber is one of the best sandwiches imaginable — don't skip the leftovers.