C.B.O'S(Cheese, Bacon And Onion On Rye)  
["1 stick Cheddar cheese (6 to 8 oz.) shredded", "1/2 lb. bacon, cooked and crushed, slice in small pieces before cooking", "1 medium onion, minced", "mayonnaise, enough to hold mixture together", "1 pkg. small dark party rye bread"]
["Mix all ingredients together.", "Place 1 teaspoon of mixture on each slice of bread.", "Place on cookie sheet.", "Place under broiler for 2 to 3 minutes.", "Serve warm."]
["Cheddar cheese", "bacon", "onion", "mayonnaise", "party rye bread"]