Prepare the Rice: Mix warm cooked rice with rice vinegar, sugar, and salt. Spread evenly into a baking dish.
Make the Salmon Mixture: In a bowl, combine flaked salmon, mayonnaise, sriracha, soy sauce, sesame oil, cream cheese, and green onions. Mix well.
Assemble the Bake: Spread the salmon mixture evenly over the rice. Sprinkle with furikake and shredded cheese if using.
Bake: Preheat oven to 375°F (190°C) and bake for 15 minutes, or until bubbly and slightly golden.
Serve & Enjoy: Scoop onto nori sheets, roll, and enjoy like sushi!