Tahoe Brunch
["12 slices white bread, crusts removed", "2 to 3 Tbsp. butter or margarine", "1/2 lb. fresh mushrooms, trimmed and sliced", "2 c. thinly sliced yellow onions", "salt and pepper to taste", "1 1/2 lb. mild Italian sausage", "3/4 to 1 lb. Cheddar cheese, grated", "5 eggs", "2 1/2 c. milk", "3 tsp. Dijon mustard", "1 tsp. dry mustard", "1 tsp. nutmeg", "2 Tbsp. finely chopped parsley"]
["Must prepare 24 hours in advance."]
["white bread", "butter", "fresh mushrooms", "onions", "salt", "Italian sausage", "Cheddar cheese", "eggs", "milk", "mustard", "dry mustard", "nutmeg", "parsley"]