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French onion soup is best enjoyed fresh, but leftovers can be stored in an airtight container in the refrigerator for up to 3 days. To reheat, simply heat the soup on the stove or in the microwave, and toast the baguette slices with cheese before serving.
Variations:
Use vegetable broth for a vegetarian or vegan version of the soup.
For a richer flavor, you can add a splash of brandy or sherry with the wine.
Experiment with different types of cheese, such as Emmental or cheddar, for a unique twist.
FAQ:
Can I make French onion soup in advance?
Yes, this soup actually tastes even better the next day as the flavors continue to develop. You can make it ahead of time and store it in the refrigerator. Reheat and top with fresh toasted bread and cheese before serving.
Can I use a slow cooker for this recipe?
Yes, you can caramelize the onions in a skillet and then transfer them to a slow cooker with the rest of the ingredients. Cook on low for 4-6 hours for a hands-off approach.
Is it possible to make this soup without wine?
Yes, you can skip the wine and use extra broth for a non-alcoholic version of the soup.
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