Make-Ahead French Onion Soup:
Cook French Onion Soup as directed and ladle into oven proof bowls. Cover the bowls and place into the refrigerator for up to 3 days. When ready to serve, preheat the oven, remove the soup from the refrigerator and place into the oven to reheat the soups for 15 minutes. Remove from the oven and top with bread and grated cheeses. Return to the oven and bake as directed.