I used to love Japanese chicken yakitori. I decided to make my own version with tofu, and it was wonderful. Just cube tofu, place on a stick (previously soaked in water if you are going to cook on a grill), and pour yakitori sauce over it to marinate for at least an hour in the fridge. Fry with a little oil (or grill) on each side for a few minutes until golden. Fight the urge to pour the remaining marinade over top while cooking, as this will stick and burn horribly (you can only imagine why I know this :).