Rinse the sushi rice under cold water until the water runs clear. This removes excess starch, ensuring fluffy rice.
In a medium saucepan, combine the rinsed sushi rice and water. Bring to a boil, then reduce the heat, cover, and let simmer for about 18-20 minutes, or until the water is absorbed. Once done, turn off the heat and let it sit for another 10 minutes.
In a small bowl, mix the rice vinegar, sugar, and salt until dissolved. Stir this mixture gently into the cooked rice until well combined. Allow the rice to cool slightly.
In a large bowl, combine the crab meat, cream cheese, mayonnaise, sriracha, and sliced green onions. Mix well until smooth and all ingredients are thoroughly incorporated.
In a baking dish, spread half of the sushi rice evenly on the bottom.
Layer the crab mixture over the sushi rice, spreading it out evenly.
Top with the remaining sushi rice, smoothing it out gently.
Place the baking dish in the oven and bake for about 15-20 minutes or until heated through and the top is slightly golden.
Once baked, remove from the oven, and let it cool slightly before garnishing.
Finally, slice the prepared sushi bake into squares, top with sliced avocado, sprinkle sesame seeds over the top, and serve with additional sriracha or soy sauce if desired.
Notes
Serve the sushi bake directly from the baking dish with a drizzle of sriracha and a sprinkle of sesame seeds. You can also serve it with additional nori sheets for wrapping individual bites.