BBC Food - Recipes - Classic French onion soup

Ingredients

• 3 tbsp olive oil
• 3 large onions , thinly sliced
• 2 thyme sprigs, leaves picked
• 1tbsp soft brown sugar
• 2 garlic cloves, thinly sliced
• 200ml/7fl oz white wine
• 1 heaped tbsp plain flour
• 50ml/2fl oz brandy
• 50ml/2fl oz dry sherry
• 1 litre/1¾ pint fresh dark beef stock
• 1 baguette , sliced thickly
• 110g/4oz Gruyère cheese, grated