Tuna Mayo Onigiri is a popular variation of the classic Japanese rice ball that features a tasty filling made with canned tuna and mayonnaise. To make Tuna Mayo Onigiri, start by cooking sushi rice according to the package instructions. Once the rice is cooked, let it cool slightly before handling. Wet your hands with water to prevent the rice from sticking, and then take a small handful of rice and shape it into a triangle or oval shape. Make a small indentation in the center of the rice ball and add a mixture of canned tuna and mayonnaise. Close the rice ball by folding the rice over the tuna mayo filling and shaping it into a compact triangle or oval shape. Finally, wrap the Onigiri with a strip of nori seaweed to hold it together and add extra flavor. Tuna Mayo Onigiri is a creamy and flavorful snack that is loved by many. It is a great option for those who enjoy the combination of tuna and mayonnaise and can be enjoyed as a quick and satisfying meal or snack.