Spicy Tuna Onigiri is a flavorful twist on the classic Japanese rice ball. To make this recipe, you will need the following ingredients: cooked Japanese short-grain rice, canned tuna, mayonnaise, sriracha sauce, soy sauce, salt, and nori seaweed sheets. Start by mixing the canned tuna, mayonnaise, sriracha sauce, soy sauce, and salt in a bowl. Season the cooked rice with salt and mix well. Wet your hands with water, then take a handful of rice and shape it into a triangle or oval shape. Make a small indentation in the center and place a spoonful of the spicy tuna mixture. Cover the filling with more rice and shape it into a ball or triangle. Wrap the onigiri with a strip of nori seaweed. Spicy Tuna Onigiri is a delicious and spicy snack that is perfect for those who enjoy a bit of heat.