Cook the rice with vinegar and salt in a saucepan, according to the package, for about 15 minutes. Fluff it with a fork and set it aside.
Set the oven to a low broil and line a rimmed baking sheet with parchment paper. Arrange the salmon fillets onto it and broil them uncovered for 15 minutes until the salmon reaches an internal temperature of 125°F (51°C).
Press the reserved rice into the bottom of a prepared baking dish.
Use a fork to shred the salmon and add it to a mixing bowl. Add three tablespoons of mayonnaise and three tablespoons of Sriracha to the bowl, and stir to combine. Then, top the rice with the salmon mixture.
Drizzle with Kewpie Mayo and Sriracha and top it with furikake; preheat the oven to 450°F (232°C) and roast for 10 minutes, followed by a high broil for 2-3 minutes until bubbling.
Top the casserole with scallions and avocado, and drizzle with eel sauce to serve.
Notes
Nutrition Disclosure:
The nutritional information shown is an estimate provided by an online nutrition calculator. It should not be considered a substitute for professional advice.