Katsu-don (カツ丼), is a very filling main dish. A bowl of rice topped with tonkatsu (deep fried crumbed pork cutlet), onion and beaten egg, cooked in dashi with sweet soy sauce. In this recipe you get two recipes – how to make tonkatsu and how to make katsu-don.Prep Time and Cook Time include time to make tonkatsu. It also assumes that katsu-don is cooked one by one.