Assembly: Divide dough into three parts. On a floured surface roll dough to about 1/8-inch thick; cut into 3-inch rounds. Place a small spoonful of the filling in the center of each round, fold and press the edges together firmly to seal.
6
Drop the pierogi in simmering chicken bouillon with 1 teaspoon of oil. Do not crowd. Simmer for 15 minutes, stirring gently to prevent sticking. Remove with a slotted spoon and drain well.
7
Place the drained pierogi in a casserole and pour sauce mixture over all.