real french onion soup

Ingredients:

• 4 large onions, thinly sliced
• 4 tablespoons butter
• 2 tablespoons olive oil
• 2 cloves garlic, minced
• 1 teaspoon sugar
• 1/2 cup dry white wine (optional)
• 6 cups beef broth
• 2 bay leaves
• Salt and pepper to taste
• Baguette slices, toasted
• 1 1/2 cups shredded Gruyere cheese (or Swiss cheese)