Katsuo Donburi is a delicious rice bowl dish made with bonito flakes and various toppings. To make this dish, you will need the following ingredients: bonito flakes, cooked rice, soy sauce, mirin, sake, sugar, ginger, garlic, green onions, and sesame seeds. Start by preparing the sauce by combining soy sauce, mirin, sake, sugar, ginger, and garlic in a saucepan. Cook the sauce over medium heat until it thickens slightly. In a separate pan, heat the bonito flakes until they become crispy. To assemble the Katsuo Donburi, place a serving of cooked rice in a bowl and top it with the crispy bonito flakes. Drizzle the sauce over the rice and garnish with sliced green onions and sesame seeds. This dish is a perfect combination of flavors and textures, with the savory bonito flakes adding a delightful crunch to the rice bowl.