Crumble bread. Mix bread and cheese and spread in bottom of greased 7 1/2 x 12 inch flat baking dish.
Beat eggs and milk together. Stir in salt, pepper and mustard. Pour over bread and cheese.
Lay bacon across top. Do not add more bacon, it will puddle.
In the morning, preheat oven to 350 degrees and bake for 50-55 minutes.