sentence: mix eggs sour cream and butter together in a bowl sentence: add flour to the bowl and mix together by hand sentence: cut the dough sentence: roll out the dough sentence: cut circles into the dough and place them on a pan sentence: place the filling on the dough sentence: rub the dough with egg wash sentence: fold the dough and use a fork to crease the edges sentence: drop the pierogis in a pot of boiling water sentence: transfer pierogis to a plate sentence: fry the pierogis in a pan sentence: garnish with onions and parsley