Combine the cream, salt, pepper, garlic and a few rasps of nutmeg. Dump in the potato slices.
Arrange the potato slices in a casserole dish, ladling on cream mix as you go. Finish with cheese and cover with buttered tin foil. Bake in the oven for 60 minutes, remove the foil then bake for 20 minutes more until there is no resistance when prodded with a knife.