2 slices of white bread
2 Tablespoons of smooth peanut butter
1 small ripe banana, mashed
2 Tablespoons butter, softened
Spread the peanut butter on one slice of bread and the mashed banana on the other. Press the slices gently together. Spread one tablespoon of butter on each side of the outside of the sandwich, making sure to cover the surface completely.
Cook sandwich until golden brown on both sides.