Cook the sushi rice as stated on the package. Let it cool. Fluff with a fork and mix in the sushi vinegar.
Mash the salmon fillets with a fork with kewpi mayonnaise, soy sauce, and hot sauce. Taste.
Prepare a bowl of lukewarm water along with the bowl of rice and the bowl of salmon.
Cut the nori into strips 2 centimeters wide and 10 centimeters long.
Wet your palms. Take a scoop of rice in your palm and make a dent. Place a teaspoon of the salmon mixture in it, add another layer of rice on top, squeeze tightly, and form a triangle. If the rice sticks to your hands, dip them in the water for a moment.
Wrap a nori sheet around the bottom of the rice and serve on a platter.
Serve with soy sauce, crispy onion, and finely chopped spring onion.
Tips
You really have to have the right rice in the house: so sushi rice. Stick well together and is ideal for making rice suits. You can fill the rice to your heart's content with cucumber or tuna, maybe a omelette? Up to you!