I stick with tried and true! Mom makes them every few months and it's like a pierogi factory in her house! LoL Sister joins in and they go at it for a day or so making hundreds to freeze them up and then she's set for a few months. Typically I end up stealing a few just after they get cooked in boiled water, fresh and untouched by sauces, or any other adders.
As for frying...I fry them with a little bit of oil, and maybe some onions/bacon and then have the ones with potato and cheese with sour creme. The ones with mushrooms, kapusta, or meat I just fry up and enjoy.
My wife doesn't make em, but she found a sweet lil old Polish lady that sells them in Oakville for a decent price, and outside of the very thin dough, they're delicious!
Think I'll thaw some out for tomorrow!