Pre-heat the bbq (or grill if using) to medium heat.
Put the lamb steaks in a non-metallic dish.
Combine all the ingredients for the marinade, pour over the steaks and mix till the steaks are coated. Cover and let marinate in the fridge for 20 mins.
Cook the lamb steaks on the barbecue (or grill) for 6-8 minutes on each side, or until any meat juices run clear. Transfer the steaks to a warm plate and leave to rest for a few mins before serving