Hot Cheese Hors D'Oeuvres
["1/2 c. mayonnaise", "1/2 c. Parmesan cheese", "1/2 c. chopped onion", "sharp cheese", "10 slices bread without crusts"]
["Cut bread into 4 squares.", "Mix first 3 ingredients together. Spread onto bread; top with thin slice of cheese.", "Broil until bubbly and serve."]
["mayonnaise", "Parmesan cheese", "onion", "cheese", "bread"]