01 - Rinse sushi rice under cold water until water runs clear. Cook rice with water in a rice cooker or on the stovetop until tender.
02 - While rice is still hot, mix in rice vinegar, sugar, and salt. Allow to cool slightly, then spread evenly into a lightly greased 9x13-inch baking dish.
03 - Preheat oven to 400°F.
04 - Place salmon fillet on a lined baking tray. Brush with soy sauce, lemon juice, and sesame oil; sprinkle with black pepper. Bake for 12-15 minutes until cooked through. Let cool slightly, then flake into chunks.
05 - In a bowl, mix mayonnaise, Sriracha, and cream cheese until smooth. Gently fold in the flaked salmon.
06 - Spread the salmon mixture evenly over the rice layer in the baking dish. Sprinkle furikake seasoning over the top.
07 - Bake for 10 minutes until heated through and slightly golden on top.
08 - Remove from oven. Garnish with nori strips, green onions, avocado slices, and toasted sesame seeds. Drizzle with extra Sriracha or unagi sauce if desired.
09 - Serve warm, scooping portions into bowls. Offer pickled ginger on the side.