Cut crust from bread; slice bread into 1 inch cubes.
Melt butter and cheeses over low heat, stirring to blend. Add spices and Tabasco sauce. Fold in the beaten egg whites.
Toss bread cubes into cheese mixture to coat and place on parchment lined cookie sheet in a single layer (leaving a small space between each piece). Refridgerate 2 hrs or overnight (or you can freeze them and bake later).
Preheat oven to 350°F and bake for 15-20 minutes until golden brown.