French onion soup is a classic and elegant dish that is perfect for a special occasion or a cozy night in. Made with caramelized onions, beef broth, and melted cheese, this soup is rich and flavorful. The onions are slowly cooked until they become sweet and tender, adding a depth of flavor to the soup. Top it with some toasted baguette slices and melted Gruyere cheese for a delicious and indulgent meal.