Heat a griddle or a small skillet over medium heat.
Slice the bread into 1/4-inch thick slices. Take 2 slices and butter 1 side of each slice. Put the bread, buttered side down, onto the griddle. Place a square of chocolate on top of 1 slice and top it with some sliced fruit. Cover with the other slice of bread, buttered side up, and grill on both sides until the chocolate is melted. Repeat with remaining ingredients. Serve immediately.
*Cook's Note: Experiment with other fruits, chopped nuts, or different kinds of chocolate.