Prep Time 20 minutes mins
Cook Time 3 hours hrs
Resting Time 15 minutes mins
Total Time 3 hours hrs 35 minutes mins
For best results, ensure that the onions are fully caramelized to bring out their sweetness, which enhances the depth of flavor in the soup. Additionally, allowing the soup to rest for 15 minutes before serving helps meld the flavors together. If you prefer, you can broil the cheese-topped baguette slices for a few minutes for extra crispiness before adding them to the soup.