Cook rice according to package directions, omitting salt. Allow the rice to cool. If you prefer, use your Instant Pot to make your rice.

In a small bowl, mix the ingredients for the sriracha sauce. Set aside.

Using a 1 cup or 1/4 cup dry measuring cup, layer cucumber, then spicy sauce, then a layer of crab and finish with rice to the top of the measuring cup.

Place the serving plate on top of the cup, carefully turn the cup and plate upside down to turn the stack out onto the plate, lightly tapping the bottom of the cup.

Drizzle about 1 teaspoon of soy sauce over the top of the sushi, then drizzle prepared wasabi sauce and the homemade sriracha sauce over the top of the sushi. Sprinkle with the sesame seeds.

Repeat with remaining ingredients and serve immediately.