This has always been a favorite of mine. I could hardly wait for cherry season to come round. I can only say that this is Eastern European I’m not sure if it’s Ukranian, Polish or East German. My mother and her family all make it, and she was from East Germany, I have Polish friends that make it and my dad’s family makes it and their from the Ukraine, then again they have major sour cherry tree orchards in all those areas so its not surprising. This is a bit time consuming I always got my kids to help they liked cutting and rolling. This is eaten as a meatless main course. You could use it as dessert or side. I've also made this with wild berries, (raspberries, black berries, blueberries and strawberries mixed)but I toss the berries in a heaping spoon of brown sugar first I couldn't wait for the cherries.