Rub the cut garlic clove round the inside of a large
earthenware baking dish. Brush the dish thickly with
some of the softened butter.
Arrange a layer of potatoes in the bottom of the
dish and sprinkle with salt, pepper and grated
nutmeg. Continue making layers of potatoes,
seasoning each layer, until they are all used.
Mix together the hot milk and cream, and then pour
the mixture over the layered potatoes, making sure
that the potatoes are almost totally covered by the
liquid.
Dot the top with the remaining butter and
bake in a preheated oven,
180°C
(350°F), Gas Mark 4, for 1-1 1/2hours, or
until the potatoes are tender when pierced with a
skewer.
Increase the oven temperature to 200°C
(400°F), Gas Mark 6 for the last 10 minutes of
cooking time to brown the top layer of potatoes.
Serve hot, straight from the baking dish.