Ingredients

• 0.5 cups butter
• 8 onions , sliced
• 2 cloves garlic , crushed
• 1 teaspoon dried thyme
• 0.5 teaspoons salt , or to taste
• 0.5 teaspoons ground black pepper , or to taste
• 1 cup red wine
• 1 tablespoon sherry
• 2 tablespoons all-purpose flour
• 2 quartss beef broth
• 1 French baguette , cut into 1/2-inch thick slices
• 2 tablespoons olive oil , or as needed
• 6 slices Swiss cheese
• 6 slices provolone cheese

Instructions

1. 1 Melt butter in a large stockpot over medium heat. Cook and stir onions, garlic, thyme, salt, and pepper in hot butter until onions are soft and brown, about 30 minutes.
2. 2 Pour in red wine and sherry; bring to a boil. Reduce heat to low and simmer until you can no longer smell alcohol cooking off, about 15 minutes.
3. 3 Meanwhile, preheat the oven to 350 degrees F (175 degrees C).
4. 4 Sprinkle onion mixture with flour and stir until coated; cook for 10 minutes. Pour in broth, stir to blend in flour, and simmer until slightly thickened, about 20 minutes.
5. 5 While soup is simmering, arrange baguette slices on a baking sheet and drizzle with olive oil. Bake baguette slices in the preheated oven until golden brown, 12 to 14 minutes, flipping slices halfway through baking. Set aside.
6. 6 Set an oven rack about 8 inches from the heat source and preheat the oven's broiler.
7. 7 Ladle soup into 6 oven-proof crocks, filling them about 3/4 full. Place 1 or 2 toasted baguette slices over each soup serving, then top each with a Swiss cheese and provolone slice. Carefully place filled crocks onto a sturdy baking sheet.
8. 8 Cook soup under the preheated broiler until cheese is browned and bubbly, 3 to 4 minutes.

Nutrition per serving