French Onion Soup, or soupe à l'oignon, is a comforting and flavorful soup that is popular in Parisian cuisine. It is made with caramelized onions, beef broth, and topped with melted cheese and toasted bread. The soup is typically served in a crock and is perfect for warming up on a chilly day. French Onion Soup is a classic French dish that should not be missed when visiting Paris.