Preheat your oven to 375°F (190°C).
Cook the sushi rice according to package instructions and allow it to cool slightly.
In a mixing bowl, combine the diced salmon, mayonnaise, Sriracha, soy sauce, rice vinegar, and green onions.
Gently fold in the cooked sushi rice until everything is well combined.
Transfer the mixture into a greased baking dish, spreading it evenly.
Sprinkle the panko breadcrumbs evenly over the top of the mixture.
Drizzle a bit of melted butter over the breadcrumbs for added richness.
Bake in the oven for about 25-30 minutes, or until the top is golden and crispy.
Remove from the oven and let it cool for a few minutes before serving.