@Steve-Miller
This recipe is pretty close to ours, though uur version skips the ham, at least for Christmas Eve.
https://valentinascorner.com/olivier-salad-recipe-russian-potato-salad/
We used to call it Babos Salad, named after an elderly Lithuanian/Russian lady who was an integral part of the Lithuanian community I grew up in. "Baba" is "grandma" in Russian; that's what we all called her. She used to use crab meat on top as a garnish. Great addition!
We use red potatoes, skins on. I dice the raw potatoes and steam them. Much easier than trying to dice them after they're cooked. Same for the carrots, dice and then either steam or zap in the microwave for a minute or two.
No cukes in ours; they tend to release too much liquid as the salad sits in the frig to chill.
I had never heard of pickles with oak leaves (agurkai su ąžuolų lapais), but this particular brand of them has become our favorites. Kėdainių Konservai products are quite available at international markets.
https://tasteitmarket.com/products/kedainiu-pickles-with-oak-leave