If you have grainy cottage cheese, then puree it with a blender with 2 tbsp. sour cream. Add semolina, sugar, vanilla sugar, lemon zest, then mix with gentle movements with egg whites beaten until stiff. Place in the refrigerator to allow the semolina to swell. Soften the butter.
Whisk the softened butter, sour cream, salt, sugar, egg and vanilla sugar, then gradually add the sifted flour with baking powder. Knead the dough until it stops sticking to your hands.
On a table sprinkled with flour, roll out the dough thinly and cut out circles using a special round shape.
Place the pre-chilled curd filling on half of each circle, place a few currants on top, cover the filling with the other half of the circle and pinch the edges.
Place the juices on a parchment-lined baking sheet with a small distance from each other, as they will increase in size during baking. Grease each juicer with the remaining yolk and place in the oven for 20 minutes at 180 ℃. When serving, sprinkle with powdered sugar.
When serving, sprinkle the juices with powdered sugar.