Ingredients
- 4 large onions, thinly sliced
- 4 tablespoons butter
- 2 tablespoons olive oil
- 1 teaspoon sugar
- 1/2 cup white wine
- 6 cups beef broth
- 1 bay leaf
- 1 teaspoon thyme
- Salt and pepper to taste
- 8 slices of baguette
- 1 cup grated Gruyere cheese
Instructions
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In a large pot, melt the butter and olive oil over medium heat.
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Add the sliced onions and sugar, and cook until caramelized, stirring occasionally, about 30 minutes.
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Stir in the white wine and cook for another 5 minutes.
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Add the beef broth, bay leaf, thyme, salt, and pepper. Simmer for 20 minutes.
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Preheat the oven to 400°F (200°C). Ladle the soup into oven-safe bowls.
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Top each bowl with a slice of baguette and a generous amount of grated Gruyere cheese.
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Place the bowls on a baking sheet and bake in the oven until the cheese is melted and bubbly, about 10 minutes.
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Serve hot and enjoy!