Add a layer of thinly sliced banana. Then fold the tortilla in half.
Toast the tortilla in a skillet on a medium heat for a few minutes on each side. Once one side is brown and toasted like a perfect marshmallow, flip and toast the other side.
Remove from skillet and cut into triangles before serving.
Notes
For a more substantive snack, use two tortillas instead of one. Instead of folding the first tortilla in half, top it with a second tortilla. (You can slather the second tortilla with a layer of peanut butter if you like, but it will also stick fine without it.)