Start by boiling the unpeeled potatoes in plenty of water for about 20 minutes. After cooking, rinse them briefly and peel with a small knife.
While the potatoes are still hot, mash them thoroughly using a potato press or a masher.
Add the egg yolk, potato starch, 1/2 teaspoon of salt, and the nutmeg. Mix everything well until a smooth dough forms. Let it sit for at least 15 minutes.Bring a large pot of salted water to a boil.
Form the mashed potatoes into dumplings by hand. Then, using a ladle, carefully drop them into boiling water.
Once all dumplings are in the water, reduce the heat to keep the water hot but not boiling or simmering.
After 15-20 minutes (depending on the size of the dumplings), remove them using a slotted spoon.
Serve the dumplings in a bowl or arrange them on plates. Enjoy!
Notes
For main dish, serve 2 to 3 big dumplings, depending on appetite.