Preheat the oven to 180°C (350°F/Gas 4).

Peel 1.5 kg (3 lb 5 oz) of potatoes, then slice them into thin rounds. Rinse the potatoes to remove all the starch, then dry them with a cloth.

Rub a flameproof roasting tin with a clove of garlic and fill the tin with the potato slices.

Mix 1 teaspoon of nutmeg with 1 litre (35 fl oz/4 cups) of cream, season with salt and pepper. Pour the mixture over the potato and bake in the oven for 1 hour.