Salmon Sushi Bake

Name: Salmon Sushi Bake
Ingredients: ½ cup mirin; ½ cup low sodium soy sauce; ¼ cup granulated sugar; ½ tablespoon cornstarch; 1 tablespoon water; ½ cup mayonnaise; 1 tablespoon sriracha; 1 pound raw, skinless salmon; ½ cup (4 ounces) cream cheese, softened; 3 cups cooked sushi rice; 1 avocado, sliced; 1 cup thinly sliced cucumber (about 2 mini cucumbers); 3 tablespoons thinly sliced green onions (about 2 green onions); 2 teaspoons toasted sesame seeds and/or furikake seasoning; sushi ginger and/or wasabi; roasted seaweed snack, for serving