Place the lamb chops in a baking dish. In a bowl combine the oil, garlic, rosemary, mint, lemon juice, Essence, salt, and pepper. Pour the marinade over the chops and turn well to coat on both sides. Let sit at room temperature for 30 minutes, or refrigerate, covered for up to 4 hours.   Place the chops in a flat layer on a broiler pan. Preheat the broiler and cook until medium-rare and brown on the outside, 2 to 3 minutes per side. Remove from the oven and serve with the Cucumber-Mint Relish. (Alternately, the chops can be grilled.)