1/2 cup mayonnaise
1/4 cup minced onion
1/2 cup grated Romano or Parmesan cheese
1 (12-ounce) loaf sliced party rye bread
Stir together first 3 ingredients. Spread 1 teaspoon mixture on each bread slice, and place slices on a baking sheet.
Bake at 450° for 4 to 5 minutes or until browned. Serve immediately.