For the Swiss potatoes, boil the potatoes in a pot of water for about 20 – 30 minutes, they must not be completely cooked. Quench with cold water and peel, cut into narrow slices.
Grease the baking dish with butter and arrange the potatoes in the dish like a roof. Sprinkle a third of the cheese, salt and pepper. Repeat this layer 2 more times, as the top layer should be cheese.
Pour the whipped cream whisked with 2 yolks on top. Bake covered in the oven preheated to 200 degrees for about 30 minutes, then remove the lid and brown for another 5-10 minutes.