Lay one tortilla flat on a clean surface.
Spread 2 tablespoons of your chosen filling (peanut butter, cream cheese, or chocolate spread) evenly over the tortilla.
Place the banana at one edge of the tortilla.
Roll tightly to form a log, keeping it snug.
Place seam-side down.
Spread the remaining tablespoon of filling over the top.
Sprinkle with toppings (peanuts, strawberries, or coconut).
Slice into 1-inch rounds to create banana sushi pieces.