Skillet Squash Au Gratin
["1/4 c. butter or margarine", "4 c. thinly sliced summer squash", "1 onion, sliced", "1 tsp. salt", "dash of pepper", "2 peeled tomatoes, sliced", "1/2 c. grated American cheese", "soy sauce (optional)"]
["Melt butter in skillet.", "Add summer squash, onion, salt, pepper and tomatoes.", "Cook, covered, for 10 to 15 minutes or until squash is tender.", "Sprinkle with cheese and soy sauce, if desired."]
["butter", "onion", "salt", "pepper", "tomatoes", "American cheese", "soy sauce"]