Ingredients
The Filling
- 4 large onions, thinly sliced
- 1 teaspoon salt
- 1 teaspoon sugar
- 1 teaspoon thyme
- 1 bay leaf
The Base
- 3 tablespoons unsalted butter
- 1 tablespoon olive oil
- 4 cups beef broth
- 1 cup dry white wine
- 2 tablespoons all-purpose flour
The Topping
- French bread, sliced
- 1 cup Gruyère cheese, grated
- Salt and pepper to taste
Instructions on the next page 👇👇