Prepare the Sushi Rice: Cook sushi rice according to package instructions. Once cooked, transfer the rice to a large mixing bowl and let it cool slightly.
Mix the Crab Mixture: In another bowl, combine the crab meat (or imitation crab), mayonnaise, and Sriracha sauce. Stir until well combined.
Layer the Ingredients: Preheat your oven to 350°F (175°C). In a baking dish, spread a layer of sushi rice evenly on the bottom. Next, add a layer of shredded nori sheets, followed by a layer of the crab mixture.
Add Additional Fillings: Layer on additional ingredients like sliced avocado, julienned cucumber, or any other desired fillings. Sprinkle furikake seasoning over the top for added flavor.
Bake in the Oven: Place the baking dish in the preheated oven and bake for about 20-25 minutes, or until the top is golden brown and crispy.
Serve and Enjoy: Once baked, remove the dish from the oven and let it cool slightly. Garnish with sesame seeds and extra furikake seasoning if desired. Serve the Sushi Bake warm, either as a main dish or as an appetizer, and enjoy!