Breakfast Casserole

8 slices of bread, cubed
6 eggs
2 C milk
1/2 tsp dried mustard
1/2 tsp salt
1 lb grated sharp cheddar cheese
1/4 C butter or margarine
optional, 1 lb of sausage, fried and drained, or 1 lb of cubed ham, bacon, or your choice of veggies

Preheat oven to 325 degrees.  Put cubed bread in the bottom of a greased casserole dish or 9 x 13-inch baking dish. In a separate bowl, beat eggs and add milk, salt, and dried mustard. Sprinkle choice of meat and cheese over the bread.  Slice butter over the cheese and pour the egg mixture over all.  Bake for 45 minutes to 1 hour, until golden brown.