Add wasabi tuna filling to the rice mold. Cover the filling with more sushi
Close the rice mold lid. If you're unable to close the lid - you probably used too much rice.
If the lid closes too easily - you probably put too little rice
Measure the length of your Onigiri triangles, cut nori strips in the appropriate length (even a bit longer just in case), and wrap your Onigri with the nori.
Note: If needed, seal the nori by dabbing both ends with a bit of water
Cut a piece of paper in a triangle shape that is slightly bigger than your Onigiri triangles. Place the paper over your Onigiri triangles, and sprinkle sesame seeds over your Onigiri
Drain tuna from liquids (water/oil)
Mix with soy sauce, wasabi sauce and mayo
Onigiri can be made with different types of fillings, including: vegetables, scrambled eggs, tuna and more.