In a microwave-safe bowl, combine rice vinegar, sugar, & salt. Microwave for 15 seconds or until the sugar is dissolved.
Place the hot freshly cooked rice in a large bowl, then drizzle the rice vinegar mixture on top. Gently mix well then set aside.
In a large bowl, combine the sushi filling ingredients. Set aside.
In an 8-inch x 8-inch baking dish, begin assembling the sushi bake by evenly layering the ingredients, starting with the sushi rice, then half of the furikake, the sushi filling, the remaining furikake, unagi sauce, Sriracha, and Japanese mayo.
Bake in the oven for 10 - 15 minutes, or until the top is golden.
Serve with nori sheets, cucumber, and avocado slices if desired. Enjoy by scooping the sushi bake onto a piece of nori and adding cucumber and / or avocado, if desired. Roll up into a bite & enjoy!
Notes
Rice: Japanese short-grain rice, typically labeled sushi or sweet rice, works well for this recipe. You can easily find it at local Asian and Japanese markets or online. For the best texture, make sure to rinse your rice grains until the water runs clear before cooking.
Protein: Feel free to swap out or add in fresh lump crab, scallops, shrimp, or flaked salmon. You can use various combinations, but just keep in mind that the protein should be already cooked and roughly chopped for adding it to the filling.
Toppings & Add-Ons: Use your favorite sushi rolls as inspiration to add to your sushi bake! Masago and tobiko are super yummy on top, but only add them on top of the sushi bake AFTER baking or on the side for your guests to add themselves.