Cheese and Onion Fondue

Melt the butter in a large saucepan, add the onion and cook for 4 or 5 minutes until soft but not brown. Peel the garlic clove, halve, and rub the inside of the fondue pot with the cut side Add about 6 fl oz of the stock, the wine, and heat until bubbling. Stir in the cheese, then gently stir over a moderate heat until the cheese is fully melted. Don't overheat to the point of boiling, it'll spoil the flavor a bit. Meanwhile, mix the remaining stock and cornflour together to form a thin paste. Add this to the fondue, and cook for a couple more minutes until thickened. Add the salt, pepper and nutmeg, and