Instructions

  1. Trim crust and cut bread into 1-inch cubes.
  2. Melt cheeses and butter in top of double boiler. Remove from heat, cool slightly, and add the egg whites.
  3. With a fork, dip each bread cube in cheese mixture until well coated. Place on baking sheet, chill overnight or freeze.
  4. Bake at 350 degrees Fahrenheit for 12-15 minutes until light brown and puffed.
  5. Serve hot.