– Fry the walnuts, grind and boil in milk for a few minutes. Stir in the semolina, boil for 10 minutes and cool.

- Grind the yolks with sugar.

– Rinse the apples, slice, remove the core, add salt and stir well with the yolks and walnuts and semolina mixture. Add the beaten egg-whites and stir carefully.

– Put the paste into a buttered pan and bake in oven for 20-30 minutes.

– Serve with the sour cream.