French onion soup is a rich and flavorful soup that is popular in French cuisine. It is made with caramelized onions, which are cooked slowly until they become sweet and tender. The soup is often topped with a slice of toasted bread and melted cheese, which adds a deliciously gooey and savory element. French onion soup is not only delicious, but it is also a great option for vegetarians, as it is typically made with vegetable broth. Whether you're looking for a comforting bowl of soup or a taste of French cuisine, French onion soup is always a good choice.