Ham and Egg Casserole

Line buttered 9x13 inch pan with 6 slices bread, buttered side up. Layer slices with shredded cheese, bite size pieces of ham and put 6 more slices of bread on top, buttered side up again. Pour egg, milk, and salt mixture over top. Refrigerate, covered for 24 hours before baking. Bake 1 hour at 300 degrees F, uncovered.