Spread peanut butter over one side of 4 slices bread; slice bananas and arrange
on top. Top with remaining bread. Spread top slices with butter or margarine. Place
sandwiches, margarine sides down, in skillet. Spread top slices with margarine.
Cook uncovered over medium heat until bottoms are golden brown, about 4 minutes;
turn. Cook until bottoms are golden brown and peanut butter is melted, 2 to 3 minutes