Cheese Omelet
["5 pieces bread, buttered on both sides", "1/2 lb. Swiss cheese", "4 eggs, well beaten", "1/2 tsp. dry mustard", "dash of pepper", "1/2 lb. Cheddar cheese", "2 c. milk", "1/2 tsp. salt", "1 can mushrooms"]
["Place bread in a 9 x 13-inch pan.", "Grate the cheeses; mix together and sprinkle on bread.", "Mix together the eggs, milk, dry mustard, salt and pepper.", "Beat well.", "Pour over cheese.", "Sprinkle mushrooms over top.", "Cover and refrigerate overnight.", "Remove from refrigerator 1 hour before baking.", "Bake at 350\u00b0 for 1 hour."]
["bread", "Swiss cheese", "eggs", "dry mustard", "pepper", "Cheddar cheese", "milk", "salt", "mushrooms"]