Sift the flour into a deep bowl, add grated on a coarse grater or cut into cubes butter. The butter and the flour to grind until crumbly crumbs, add salt, two of sugar. I used vanilla sugar TM Dr. Oetker. In a separate bowl, beat yolk with ice water, add mixture to flour crumbs and knead the dough.

Wrap the dough in cling film and put into the refrigerator for 30 minutes.

To prepare the filling. Prunes, Apple, roasted nuts grind in a food processor until smooth. Add the lemon juice and sugar to taste.

For forming cookies, you will need a form for making dumplings. Divide the dough into 2 equal portions, roll out into a thin layer. One part is to put on the form. In the cell put the stuffing and close the second layer of dough, rolled with a rolling pin.

"Dumplings" to lay out on the baking tray lined with silicone Mat or baking paper. Bake cookies in preheated to 200 ° oven for 20 minutes.