Breakfast Casserole

1 1/2 pounds sausage meat -- cooked and drained
9 large eggs -- beaten slightly
3 cups milk
1 teaspoon salt
1 1/2 teaspoons dry mustard
3 slices bread -- diced
1 1/2 cups grated cheddar cheese

Stir together all ingredients and pour into a greased 9x13" casserole. Bake at 350 degrees uncovered for one hour.
Also good if you add sauteed onion and mushrooms.