Every party we go to, I bring these filling appetizers, and I always bring home an empty tray. In addition, I always have a supply in the freezer for a delicious and quick snack.
In a bowl, combine the onions, bacon, mayonnaise and Swiss cheese
Spread about 1 teaspoon of pizza sauce on each slice of bread
Top with about 1 tablespoon of the cheese mixture
Bake on an ungreased baking sheet at 350