Peel and wash the potatoes and, depending on the size, cut them in half. Mix the sour cream with the cream. Season with salt, pepper and nutmeg.
Put the potatoes in a greased casserole dish and pour the sour cream over them. Cook in a preheated oven at 175 ° C (convection: 150 ° C) for about 1 1/2 hours.
Finely grate the cheese.
Sprinkle the cheese on the potatoes about 20 - 30 minutes before the end of the cooking time and bake them.