Katsuo Nigiri is a type of sushi that features thinly sliced bonito fish on top of a small mound of sushi rice. To make Katsuo Nigiri, you will need bonito fillets, sushi rice, soy sauce, wasabi, and pickled ginger. Start by cooking the sushi rice according to the package instructions. Once the rice is cooked, let it cool slightly before shaping it into small oblong shapes. Slice the bonito fillets into thin pieces and place them on top of each rice mound. Serve the Katsuo Nigiri with soy sauce, wasabi, and pickled ginger on the side. The combination of the tender bonito fish and the slightly tangy sushi rice makes Katsuo Nigiri a delightful and satisfying dish.