Elvis Presley's Fried Peanut Butter and Banana Sandwich

1 small ripe banana
2 slices white bread
3 tablespoons peanut butter
2 tablespoons butter

In a small bowl, mash the banana with the back of a spoon. Toast the bread lightly. Spread the peanut butter on one piece of toast and the mashed banana on the other. Fry the sandwich in melted butter until each side is golden brown. Cut diagonally and serve hot.