French Onion Soup

Ingredients

• 3Tbsp unsalted butter
• 2 cloves of garlic
• 6 large red or brown onions, thinly sliced
• 1 cup dry white wine
• 1 Tbsp dry sherry
• 8 cups good quality beef broth
• 3 bay leaves
• 2 sprigs of fresh thyme
• 1 Tbsp all-purpose flour
• 1 cup grated Gruyere cheese
• 1 cup grated Parmesan cheese
• Salt and Pepper to taste
• Slices of French Bread
• 3 Tbsp olive oil