From a Polish Country House Kitchen's Pierogi With Potato, Cheese, Bacon, and Peas Filling

Directions

On a clean work surface, mound the flour and make a well in the center. Add the egg, vegetable oil, and salt to the well and carefully beat together with a fork without incorporating the flour. Continue stirring with a wooden spoon, adding small amounts of the warm water, and gradually incorporating the flour. Only add the next bit of water when the last has been thoroughly blended with the flour and the mixture has become dry. Once the dough has begun to form, lose the spoon and knead the dough with your hands. Stop adding water once all the flour has been incorporated and a soft dough has formed .