In a saucepan, combine: the cream with the lemon zest, garlic, nutmeg, salt, and black pepper to taste.
Bring it to a boil and let it cool for 10 minutes to chill.
Slice the potatoes into thin rounds.
Grease a baking dish with butter and place the potatoes in the baking dish.
Remove the thyme, lemon zest, and garlic from the cream sauce.
Pour the sauce over the potatoes,
Cover with grated cheese and bake for 50-60 minutes at 200°C.
