BLUEBERRY SOCHNIKI

Combine the softened butter with sugar, egg, and sour cream, mixing thoroughly.

Sift the flour with baking powder, add it to the wet mixture, and knead the dough.

Wrap the dough in plastic wrap and chill in the refrigerator for an hour.

Meanwhile, prepare the filling: mix the cottage cheese, egg white, sour cream, flour, semolina, sugar, and vanilla. Gently fold in the blueberries.

Roll out the dough and cut out 10 cm rounds. Place the filling on one half of each round and gently fold the other half over it.

Brush the pastries with a mixture of egg yolk and 1 tbsp of milk. Bake in a preheated oven at 180 °C (350 °F) for 25 minutes.