Tandoori-Spiced Grilled Butterflied Lamb

Cut butterflied lamb in a couple of places almost but not all the way through to increase surface and even out the roast’s thickness.

Process garlic and ginger in a food processor or blender until minced. Add remaining spices and oil; continue to process to a smooth paste. Spread on both sides of the lamb; let stand for an hour to give the lamb a chance to come to room temperature.

Preheat gas grill igniting all burners on high for at least 10 minutes. Place lamb, cut side down, on hot grill rack; grill, covered, until nicely brown, 4 to 5 minutes. Turn lamb and continue to grill, covered, until nicely brown on the other side, 4 to 5 minutes longer.

Turn off all but one burner on grill, transfer lamb to a platter, stick a meat thermometer into the thickest portion of the lamb, and let it rest for 10 minutes (the temperature should increase about 10 degrees). Return lamb to grill, setting it over the unignited area. Continue to cook roast, maintaining the grill temperature at 300 to 350 degrees or between low and medium, adjusting burner as necessary. Cook until meat thermometer registers 140 degrees for rosy pink meat, about 30 minutes. (To slow the cooking, simply turn the burner to low heat.)

As soon as lamb comes off the grill, drizzle with optional lemon juice and sprinkle with cilantro. Divide lamb into individual muscles. Slice across the grain, arrange on a platter, drizzle with accumulated juice and serve immediately.