In a bowl, combine the cheese, ham, mayonnaise, bacon and mustard. Split biscuits into thirds. Press onto the bottom and up the sides of ungreased miniature muffin cups. Fill each with about 1 tablespoon of cheese mixture.
Bake at 450º for 9-11 minutes or until golden brown and the cheese is melted. Let stand for 2 minutes before removing from the pans.