I might be the last one to find out about it, but just in case someone didn't know just yet, now you do. Now every time I have some cooked potato leftover, I make Kartoplyaniki.
We serve them with sour cream or Adjika. Or both. Some of my family members eat them with ketchup, but I don't like ketchup as much, I think it kills the taste of whatever you are eating. What do eat Kartoplyaniki with?