Wash the potatoes and cook in a little water. Pour off the cooking water, allow the potatoes to evaporate well and peel them. Immediately squeeze through a potato press into a bowl and allow to cool.
Add the egg and flour, season with salt and nutmeg. Knead quickly into a smooth dough.
Shape half of the potato dough into a 1.5 cm thick roll, divide it into 3 cm long pieces and shape the ends with floured hands to a point.
Beat the egg white with a fork and place on a plate.
Mix the hazelnut flakes with the grated nuts on a second plate. Turn the fingernoodles first in egg white, then in the nuts and fry them in the hot clarified butter until golden brown.