Breakfast Casserole

1 pound bulk sausage, browned & drained
6 eggs
2 cups milk
6 slices bread
1 teaspoon salt
1 teaspoon dry mustard
1 1/2 cup grated cheddar cheese

Optional
1/2 cup sliced mushrooms
1/2 cup chopped green onions

Crumble the bread, discarding the crusts. Beat eggs well and add breadcrumbs, milk, salt and mustard. Add sausage and cheese. Pour into greased9 x 13 inch baking dish. Store in refrigerator overnight and bake the nextmorning. I have used ham instead of sausage in this and it is great!Bake uncovered at 350° for 45 minutes. Let stand a few minutes before cutting.