Soupe à L'Oignon is a traditional French onion soup made primarily from caramelized onions, beef broth, and topped with melted cheese and crusty bread. The dish is known for its rich, savory flavor and is often served as an appetizer or a comforting meal. The origins of Soupe à L'Oignon date back to ancient times, but it became popular in France during the 18th century. It is commonly enjoyed in bistros and restaurants across France, especially in Paris, where it is a staple of French cuisine.