5 slices buttered bread
3/4 lb. (1 lg. bag) grated sharp cheese
4 eggs, beaten slightly
2 c. milk
1/2 tsp. dry mustard
1/2 tsp. salt (optional)

Cut bread in cubes. Alternate layers of bread and cheese in buttered baking dish (2 quart casserole). Mix other ingredients together and pour over cheese and bread. Let stand several hours or overnight. Bake 1 hour at 350 degrees uncovered.