Place the cream, milk and garlic in a saucepan and slowly bring to the boil.
Remove from the heat and allow to cool.
Peel and thinly slice the potatoes (about 2 millimetres thick).
Butter a small baking tray or ovenproof dish and season lightly with salt and pepper Arrange slices of potato over the bottom of the dish overlapping as you go, lightly seasoning each layer with salt and pepper until all the potato is used up.
Pour the cream and milk mixture over until the potatoes are just covered.
Press down the potatoes with something flat so that the cream covers all of the potatoes.
Bake in a moderate oven (350°F) for about 30 minutes.
Turn the oven down to 300°F and sprinkle the potatoes with grated cheese.
Cook until tender for a further 15 minutes (approx).
If the potatoes get too brown on top for your liking, cover them with aluminium foil.