Boil the chicken fillet in salted water until tender.
Chill and cut into small pieces.
Hard-boiled eggs, chill, peel and chop finely.
Cut the prunes into small pieces.
If the prune is very dry — put it into the boiling water for 10 minutes.
Finely chop the nuts.
Peel apples and grate on a coarse grater.
Grate the cheese on a medium grater.
Form the salad in layers, smearing each layer with mayonnaise: chicken fillet —prunes — eggs — grated apple — grated cheese — walnuts.
Before serving, put the salad in the refrigerator for 1 hour (to soak).