RUSKIE PIEROGI (PIEROGI WITH CHEESE & POTATO FILLING)

Steps:

• Combine all of the ingredients listed under filling and refrigerate until ready to assemble pierogi.
• Combine flour, salt and butter in food processor.
• In a separate bowl, blend together egg, egg yolk, milk and sour cream.
• Add egg mixture to flour mixture and process until dough cleans sides of bowl and sticks together (the dough will be slightly sticky).
• Remove from processor, shape into a ball, wrap in plastic and chill for 3 hours or overnight.
• Cut dough into thirds; roll each section out on floured surface into 12" round.
• Cut each round into 8 (3") circles (using a glass works well).
• Place about 2 tsp filling on each dough circle.
• Moisten outer edges with water and fold dough over to close.
• Seal edges by pressing gently with the back of a fork or pinching together with your fingers.
• In large pot, bring salted water to boil.
• Cook 12 pierogi at a time, reducing heat to a gentle boil; boil until pierogi float to the surface (about 5 minutes).
• Remove with a slotted spoon, drain on paper towel and transfer to serving dish.
• Repeat with remaining pierogi.
• At this point you can serve them warm, freeze them for later use or fry them in butter over medium heat, lightly browning both sides before serving.