French Onion Soup with Gruyere Toasts - Adelaide Central Market: Home to over 70 traders under one r

Ingredients

• 50 unsalted butter
• 2 tbsp olive oil
• 750g brown onions, peeled and sliced
• 2 cloves garlic
• 2 tbsp plain flour
• 1 cup (250ml) dry white wine
• 5 cups (1.25L) beef stock
• 2 tbsp dry sherry
• 2 bay leaves
• Sea Salt flakes and freshly ground black pepper