Anago Donburi is a comforting and satisfying rice bowl dish that is perfect for a quick and easy meal. To make this recipe, you will need cooked sushi rice, anago fillets, soy sauce, mirin, sugar, and green onions for garnish. Start by preparing the sauce by combining soy sauce, mirin, and sugar in a small saucepan. Simmer the sauce until it thickens slightly and set it aside. Heat the anago fillets in a separate pan until they are warmed through. Place a generous amount of sushi rice in a bowl and top it with the heated anago fillets. Drizzle the sauce over the rice and anago, and garnish with sliced green onions. The combination of the tender anago, flavorful sauce, and fluffy sushi rice makes this dish a comforting and delicious option for any meal.