These elegant sandwiches would be great for a shower, reception, or luncheon. Serve on mini-croissants or slice a regular croissant in half if using as part of a buffet. You may want to add a leaf of butter or Boston lettuce to these sandwiches and you can substitute 3 to 6-inch pieces of French bread, buttered and lightly toasted, for the croissants.From an August 1988 issue of Bon Appetit in the "Cooking for Friends" section.