1Prepare barbecue (medium-high heat). Whisk together first 4 ingredients in small saucepan. Brush about 5 tablespoons of sauce over both sides of chops. Reserve remaining sauce. Grill chops to desired doneness, about 4 minutes per side for medium-rare. Place 2 chops on each of 4 plates. Bring remaining sauce to simmer. Drizzle over lamb and serve.