Eggs Supreme
["3 c. plain croutons", "1 1/2 c. sharp Cheddar cheese", "6 eggs", "3 c. milk", "1 tsp. dry mustard", "pepper", "1 small can mushrooms", "1/2 tsp. onion salt", "ham or bacon pieces"]
["Butter a 9 x 13-inch pan.", "Beat eggs; add milk, onion, salt, mustard and pepper.", "Put croutons in pan first, then cheese and mushrooms and add eggs last.", "Sprinkle with ham or bacon pieces. Put foil on top and refrigerate if doing ahead of time.", "Bake at 325\u00b0 for 45 to 50 minutes."]
["croutons", "Cheddar cheese", "eggs", "milk", "dry mustard", "pepper", "mushrooms", "onion salt", "ham"]