Rinse and soak the sushi rice for 30 minutes before cooking.
Cook the sushi rice in a rice cooker or on the stovetop with water.
Prepare the spicy salmon mixture by combining mayonnaise, sriracha, soy sauce, and rice vinegar in a bowl.
Flake the cooked salmon and fold it into the spicy mixture gently.
Preheat the oven to 350°F (175°C).
Spread the cooked sushi rice in an even layer at the bottom of a baking dish.
Layer the spicy salmon mixture over the sushi rice evenly.
Bake the dish in the oven for about 25-30 minutes until heated through and slightly crispy on top.
Remove from oven and let it cool slightly before garnishing with avocado slices and green onions.
Serve warm, garnished with sesame seeds, and enjoy!