1 lb sliced bacon
2 12 cups shredded cheddar cheese
2 tablespoons prepared mustard
1 cup mayonnaise
1 lb 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.