Combine dry ingredients: flour (2⅔ 200 ml cups), sugar, baking powder and vanilla sugar. Mix thoroughly.
Rub the cottage cheese through a fine sieve and place in a bowl.
Add chopped butter and egg.
Pour in the prepared dry ingredients mixture.
Knead the dough with quick strokes. After all the ingredients come together, knead the dough for another minute. Then put the dough in the refrigerator for 10 minutes while you cook the filling.
Wash the apples, peel and core them and cut into small cubes.
Combine apples, sugar and starch in a bowl. Stir. You can also add a handful of raisins, nuts, some cinnamon, or lemon / orange zest to the filling, if desired.
Turn on the oven to heat up to 170-180 degrees. Remove the dough from the refrigerator. Place a sheet of baking paper on a work surface and lightly dust with flour. Roll out the dough on paper into a rectangular sheet about 4 mm thick.
Place the apple filling in the middle, along the rolled out dough
Make the same number of cross cuts on the free edges of the dough on both sides at 1-1.5 cm intervals (using a pizza cutter or a regular knife), moving from the filling to the edges.
Wrap the short pieces of dough around the edges on the filling (see photo).
Close the filling by intertwining the strips of dough – bending one at a time, alternately on each side and forming a kind of pigtail (see photo). Hide the ends of the dough strips inside (towards the filling).
Gently transfer the cake and paper onto a baking sheet. Use a fork to loosen the egg. Grease the curd pie with an egg and send it to an oven preheated to 170-180 degrees for 40-45 minutes, bake until golden brown.
The cottage cheese pie with apples is ready. Cool it on the wire rack.
Sprinkle icing sugar on the apple pie before serving, if desired. Cut the pie into portions and serve.
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