Slightly whip the egg, add to it the yogurt, sugar, salt and mix. Slide a mound of sifted flour. Make it a small indentation and pour back the egg-kefir mixture.
Knead the dough. The consistency of it must be soft, plastic, not too hard and not stick to hands. The dough cover with a cloth and leave aside for 20 minutes.
At this time, prepare the stuffing for dumplings. Cottage cheese wipe through a sieve. Add in the cottage cheese, egg, sugar, vanilla sugar, salt and mix it well.
Precipi the table with flour and roll the dough in a thin layer. With the help of glass or Cup with a sharp edge cut the circles for future dumplings with cottage cheese.
In the center of each circle put the filling, sasieni the edges (you can make a beautiful braid or just zasypki) and put the dumplings on a floured Board.
Boil large amount of water, put in boiling water dumplings with cottage cheese and boil until they float to the surface, about 5 minutes.
Serve dumplings with cottage cheese sour cream, yogurt, jam or honey.