Preheat the oven to 325 F. Using a mandoline slice the potatoes 1/8" thick and soak in cold water for 1minute. Drain well. Mix the butter and garlic in a small bowl. Use a third to grease a shallow oven proof dish.
Spread a layer of potatoes over the bottom. Sprinkle lightly with the nutmeg, salt and pepper. Add a layer of cheese. Dot with half the remaining butter. Repeat layers with remaining potatoes, seasoning and cheese; ending with a layer of cheese on top. Pour the cream over the top and dot with remaining butter.
Bake in the oven for about 1 1/2 hours, until potatoes are creamy and golden.