Cheesey Bacon Puffs

1 pound sliced bacon
2 1/2 cups shredded Cheddar cheese
2 tablespoons prepared mustard
1 cup mayonnaise
1 pound sliced pumpernickel party bread

Place bacon in a large, deep skillet.
Cook over medium-high heat until evenly brown.
Drain, crumble and set aside.
Preheat oven to broil.
In a medium bowl combine the bacon, cheese,
mustard and mayonnaise. Stir well.
Arrange party bread on a cookie sheet.
Spoon mixture onto each slice of bread.
Broil for 5 minutes, or until bubbly.