Cocktail Rye Hors d'Oeurves

Description
This recipe came from an estate sale. I obtained it when I purchased the family collection from the Turnham Estate in Dallas, Texas in 1992. I made these for a dinner party I hosted. Mixed reviews. Many thought they were fabulous, others passed on them. Dated 1967.
 * Contributed by Catsrecipes Y-Group

Ingredients

 * 1 cup mayonnaise
 * 1 cup shredded sharp cheddar cheese
 * ½ cup parmesan cheese
 * 1 cup sliced green onions
 * cocktail rye bread slices

Directions

 * 1) Combine mayonnaise, cheeses and onions.
 * 2) Mound about 1½ tablespoons onto each bread slice.
 * 3) Place on a baking sheet and put under broiler until bubbly watching to make sure they don't burn.