Directions
Create the Marinade: In a small bowl, combine the chopped parsley, minced garlic, lemon zest, ground coriander, cumin, smoked paprika, red pepper flakes, allspice, and olive oil.
Stir until it forms a thick, fragrant paste.
Prepare the Lamb: Pat the entire leg of lamb completely dry with paper towels.
Using your hands, rub the marinade paste evenly over every surface of the meat, working it into any crevices.
Marinate for Flavor: Place the coated lamb in a large dish or a resealable bag.
Cover or seal tightly and refrigerate for at least 8 hours, or preferably overnight, to allow the flavors to deeply penetrate the meat.
Temper the Meat: Remove the lamb from the refrigerator 30 minutes before you plan to cook.
Letting it come to room temperature ensures more even roasting.
Preheat and Prep: Preheat your oven to 350°F / 177°C with a rack in the center position.
Place a greased metal rack inside a large roasting pan.
Roast to Perfection: Position the leg of lamb on the rack, fat-side up.
Transfer to the oven and roast for 75 to 90 minutes. For even browning, rotate the pan halfway through the cooking time.
Check for Doneness: The most reliable way to check for doneness is with a meat thermometer. For a perfect medium-rare, the internal temperature should read 135°F / 57°C when inserted into the thickest part of the meat, avoiding the bone.
Rest the Roast: This step is crucial!
Remove the lamb from the oven, transfer it to a cutting board, and tent it loosely with aluminum foil.
Let it rest for 15-20 minutes. This allows the juices to redistribute, ensuring a moist and tender result.
Carve and Serve: Carve the lamb against the grain into beautiful slices and serve immediately to your delighted guests.