Ingredients
- 4 large yellow onions, thinly sliced
- 3 tablespoons butter
- 1 tablespoon olive oil
- 3 cloves garlic, minced
- 6 cups beef broth
- 1 teaspoon Worcestershire sauce
- 1 teaspoon dried thyme
- 1 bay leaf
- Β½ teaspoon salt
- Β½ teaspoon black pepper
- 1 baguette, sliced
- 1½ cups shredded Gruyère or Swiss cheese
Method
- Melt the butter with olive oil in a large pot over medium-low heat.
- Add the sliced onions and cook for 30β40 minutes, stirring occasionally, until deeply golden and caramelized.
- Add the garlic and cook for 1 minute.
- Pour in the beef broth and Worcestershire sauce. Add thyme, bay leaf, salt, and pepper.
- Bring to a gentle simmer and cook for 20β25 minutes. Remove the bay leaf.
- Toast the baguette slices until crisp.
- Ladle the soup into oven-safe bowls and place a toasted bread slice on top.
- Cover generously with shredded cheese.
- Broil for 2β4 minutes, until the cheese is melted, bubbly, and golden brown. Serve hot.