8 slices bread, white or wheat
1 lb. grated Cheddar cheese
1-2 c. ham bits (optional)
1 can mushrooms, drained (optional)
8 eggs
2 tsp. dry mustard
1 tsp. salt (less if you use ham)
4 c. whole milk

Cube bread slices. Line bottom of well-greased 9x13 inch pan with cubes. Sprinkle ham, mushrooms and cheese on evenly. Beat together eggs, mustard, salt and milk and pour over mixture. Refrigerate overnight. Bake for 1 hour at 350 degrees.