Grease 13x9 inch glass baking dish.Remove crusts from bread and cut or tear bread into cubes.Place bread in prepared dish.Top with meat and cheese.Whisk together eggs and next 4 ingredients.Pour over cheese.Dot the top with butter.Cover dish and place in refrigerator overnight or up to 24 hours.Remove dish from refrigerator at least half an hour before baking.Preheat oven to 350° and bake casserole uncovered until puffy and center is set, about 50 minutes.Remove from oven and let it cool for just a few minutes before you cut into it.