Preheat oven to 450°F. Prepare a baking sheet with aluminum foil and top with a wire rack. Place the lamb on the wire rack, fat side up. Let rest at room temperature for 45 minutes. Combine the garlic, cilantro, salt, olive oil, and pepper in a food processor. Pulse until the garlic and cilantro are finely chopped, but not pureed. Rub the mixture on the lamb.

Turn the broiler on to high and cook until the fat begins to crisp up, about 2-4 minutes. Remove from the oven and cover in aluminum foil. Let rest for 10 minutes. To serve, use a sharp knife and cut portions between the bones.