INGREDIENTS:
- Olive oil
- 4-5 slices stale artisan baguette
- 2 medium onions, thinly sliced
- 2 Tbsp dry sherry
- 3 cups beef broth
- 2 cups chicken broth
- 2 sprigs fresh thyme
- Salt and freshly ground pepper
- 2 cups grated Gruyere or Emmentaler cheese
DIRECTIONS:
Preheat oven to 400°.
Brush bread slices with oil. Place bread on a rimmed baking sheet and bake until golden brown, turning once, 10-12 minutes. Set aside. Increase heat in oven to broil.
In a large saucepan over medium-high heat, add 1 1/2 tablespoons oil. Add onions and cook until browned, 20-25 minutes. Add sherry and cook until evaporated. Add broths, thyme, liberally season with salt and pepper, increase the heat to high, and bring to a boil. Discard thyme sprigs.
Meanwhile, divide bread between 4 soup bowls. Pour soup into each bowl. Divide cheese evenly between bowls. Place bowls on a rimmed baking sheet and broil until cheese is bubbly and browned in spots, about 3 minutes.