I love pierogies and the frozen variety don't hold a candle to homemade, but it seems to me that 24 potatoes would be far too many potatoes for this dish. That translates into one potato for each pierogie. Perhaps it should be 2 to 4 medium potatoes?
I followed the reciepe. I made close to 40 with this. I boiled them first and browned in butter, served. They were very yummy. I could have added more cheese!