Classic Onigiri is a popular Japanese rice ball snack that is simple yet delicious. To make this recipe, you will need the following ingredients: cooked Japanese short-grain rice, salt, and various fillings such as umeboshi (pickled plum), grilled salmon, or tuna mayo. Start by seasoning the cooked rice with salt and mix well. Wet your hands with water to prevent sticking, then take a handful of rice and shape it into a triangle or oval shape. Make a small indentation in the center and place your desired filling. Cover the filling with more rice and shape it into a ball or triangle. Repeat the process with the remaining rice and fillings. Classic Onigiri can be enjoyed as a snack or a light meal. It is perfect for picnics or lunchboxes.