Niall McKenna's French Onion Soup – Waterman House

Ingredients

• 50g butter
• 1 tbsp olive oil
• 1kg white onions, peeled, halved and thinly sliced
• 1 tsp of sugar
• 4 cloves garlic, finely chopped
• 2 tbsp plain flour
• 250ml white wine, dry is recommended
• 1.2 litres chicken stock
• 2 slices of baguette
• 140g Gruyère cheese, grated