Mix the marinade in a bowl then brush the steaks generously with the marinade. Put them in a shallow dish and pour over any remaining marinade. Cover and chill for at least an hour in the fridge (preferably overnight).
Take the lamb steaks out of the fridge 30 minutes before cooking.
Heat your BBQ, grill or griddle pan. Season the steaks with salt and pepper then fry them for 3-5 minutes on each side, turning them every minute.
When the steaks are cooked to your liking, transfer them to a plate and rest for 5 minutes before serving with your chosen side dishes.