For the dough, mix the sifted flour, a pinch of salt, yolk, kefir and soda. Knead a homogeneous, smooth, slightly sticky dough.
You don’t have to worry about the “light” stickiness. When you roll out, the dough will still be sprinkled with flour. But if the dough is scored with flour, then the dumplings will turn out tough.
The dough is ready.
I put it aside, you can cover it with something so that it doesn’t start.