Mix all the marinade ingredients together in a bowl.
Place lamb chops into a large bag or plastic container and cover with marinade. Seal bag or cover the container and shake to coat the meat in marinade mixture. Leave in fridge for 4 hours or overnight and turn occasionally.
Remove the chops from the marinade and place under a hot grill. Grill for approximately 25 minutes turning occasionally.
Meanwhile, fry the onions, garlic clove and chopped peppers in olive oil until soft and serve hot alongside the grilled chops.
For top tips on protecting you and your family when preparing raw meat and poultry, visit Food Safety in the Home and view the full Food safety at home video.