French Onion Soup

Ingredients

• 6 large white onions, thinly sliced
• 4 tablespoons unsalted butter
• 2 tablespoons olive oil
• 1 teaspoon sugar
• 1 teaspoon salt
• 8 cups beef broth
• 1/2 cup dry white wine (optional)
• 2 tablespoons all-purpose flour
• 2 cloves garlic, minced
• 1 bay leaf
• 1/2 teaspoon dried thyme
• Salt and pepper to taste
• 1 baguette, sliced
• 2 cups grated cheese