Ficelle is a type of thin sandwich named for a thin baguette-style bread of the same name. (Ficelle means “string” in French if your guests ask.) If you can think of the combination, you can put on a ficelle, but the key to a good ficelle is not going overboard on sandwich filling since the bread is thinner. You want to pick just a few things and use the ingredients sparingly.
What’s great about these sandwiches is that you can mix and match a bunch of different types and then slice them in to smaller portions, giving everyone a chance to sample a variety a different flavors.