Onion soup with cheesy croutons is a classic French dish that is both comforting and delicious. The soup is made by caramelizing onions until they are soft and sweet, then simmering them in a flavorful broth until they are tender. The cheesy croutons add a crunchy and cheesy element to the soup, making it even more satisfying. This soup is perfect for a cozy dinner on a cold evening.