In Poland we prepare a very similar salad for Christmas! We also add carrots, potatoes, celery, apple, mustard and peas. Instead of hens in our version you will find eggs, so also very similar.

The difference is the acidified cucumbers. They are a bit like picles:



But those cucumbers have been pickled in a brine and left to fermentation for some time. We add to them dill stems and garlic. They have an acidic, deep taste and perfectly break the taste and "heaviness" of mayonnaise. They are also an ideal addition to potatoes.

I'm surprised that in such faraway countries we have so similar salads. I'm very happy because I run FOODspedition for such surprises. 😉
Thank you for your entry @joseangelvs!