This is a small nibble, with a bread or pastry base, usually served at cocktail parties.

Plain or toasted bread or crackers topped with a savory mixture. Usually served as appetizers, with cocktails, snacks or for lunch. They may be served hot or cold, they are often elaborately garnished.

A small piece of fried or toasted bread with a topping. Served as an appetizer.

small pieces of toast with toppings

originally a slice of crustless bread; now also used to refer to a variety of hors d'oeuvre consisting of toasted or fried bread, spread with forcemeat, cheese, and other flavorings.