Originating from the French city of Nice, pissaladière is a baked tart that is similar to a pizza, but thicker. In the past, it was usually baked and sold each morning, but today it is traditionally served as an appetizer or a snack, consisting of a doughy base that is topped with anchovies, olives, caramelized onions, and fresh herbs.
The name of the dish comes from the French phrase pèi salat, which translates to salted fish, one of the key ingredients used in the preparation of pissaladière. It is believed that the dish was invented between 1305 and 1377, during the Avignon Papacy.