Heat the milk with the sugar and raisins.
When the sugar has completely dissolved, add it to the ground walnuts.
Stir then add the vanilla. Set aside.
Remove the dough from the fridge and divide it into two pieces.
Roll the first piece into a thin rectangular sheet.
Spread on the poppy filling and roll tightly.
Place the cake on a tray lined with baking paper.
Roll out the other piece of dough and spread on the walnut filling.
Roll tightly and place the cake next to the poppy cake.
Brush both with the egg yolk diluted with a tablespoon of milk.
Place them in the fridge for 10 minutes to harden the yolk.
After 10 minutes, remove the cakes from the refrigerator and brush them with beaten egg white.
Refrigerate again for 10 minutes.
Preheat the oven to medium heat: 180 C degrees (356 Fahrenheit).
When the oven is hot, place the tray in the oven.
Bake for 35-40 minutes, until nicely browned on top.
They'll get a shiny golden crust, formidable. Once cooled completely, slice them up. Enjoy!