Mushroom Pierogies

I've somehow managed to forget what real pierogies taste like, even though I spent a week eating pierogies and not much else (except ketchup pizza from Pizza Hit) because it's pretty much the only vegetarian Polish food, unless you count Zywiec. Or at least if they weren't vegetarian, I couldn't tell--except for the ones topped with bacon. Those weren't vegetarian.

I used this recipe but I was lazy and went with wonton skins instead of making my own dough.