Butter bread with softened butter; set aside. In a 10-12 inch
skillet melt 1/2 cup butter and slowly brown mushrooms and onions
until tender. Season to taste with salt and pepper. Set aside.
Cook sausage and cut into bite size pieces. In greased 11 x 7
shallow casserole layer 1/2 bread then mushroom mixture, sausage,
and then cheese. Repeat ending with cheese. In medium sized bowl
mix eggs, milk, mustard, nutmeg, and 1 teaspoon salt and 1/8
teaspoon pepper. Hand beat. Pour over casserole. Cover and
refrigerate overnight. Sprinkle parsley over casserole before
baking. Bake uncovered at 350 degrees for 1 hour or until bubbly.
