Start by preheating your oven to 375°F (190°C). This ensures it's ready to go once your salmon and rice are prepared.
Rinse the sushi rice thoroughly under cold water until the water runs clear. This removes excess starch and helps the rice achieve the right stickiness. Add the rice and water to a saucepan and bring to a gentle boil. Once boiling, lower the heat to a simmer, cover, and cook for 15-20 minutes until the water is fully absorbed. Remove from heat and gently stir in rice vinegar, sugar, and salt while the rice is still warm. Mix well to evenly distribute the flavor, then set aside to cool slightly.
While the rice cooks, pat the salmon fillet dry and season with salt and pepper. In a small bowl, mix coconut aminos (or soy sauce), honey, and crushed garlic. Rub this mixture over the salmon evenly. Place the salmon on a lined baking sheet and bake for 15-18 minutes, depending on its thickness, until it flakes easily with a fork.
Once baked, remove the skin and transfer the salmon to a mixing bowl. Flake it gently using a fork. Add the chopped scallions, softened cream cheese, and spicy mayo. Stir until everything is well combined into a creamy, cohesive mixture.
Increase your oven temperature to 400°F (200°C). Spread the seasoned rice evenly into a 9x9-inch baking dish, pressing lightly to form a firm base. Sprinkle a generous layer of furikake or crushed seaweed snacks on top of the rice.
Spoon the salmon mixture evenly over the rice base. Smooth out the surface using a spatula, then drizzle eel sauce and more spicy mayo over the top for extra flavor and color.
Bake for 10 minutes, then switch your oven to broil mode for 2-3 minutes until the top is slightly golden and bubbling. Keep a close eye to prevent burning.
Remove the dish from the oven and let it rest for 5 minutes. Garnish with sesame seeds, avocado slices, chopped scallions, and fresh jalapeños.
If you're prepping in advance, you can layer the cooked rice and salmon mixture in the dish earlier in the day. Keep it covered in the fridge and bake it just before serving to maintain the best texture and flavor.