Polish Pierogi with Boiled and Baked Finish

Method

1. In a bowl, mix flour, egg, milk, and salt to form a dough. Knead until smooth, then let rest for 30 minutes.
2. Boil potatoes until tender, then mash them with cheese, onion, salt, and pepper.
3. Roll out the dough and cut into circles. Fill each with the potato-cheese mixture.
4. Boil the pierogi for 3-4 minutes until they float, then drain.
5. Place the pierogi on a baking sheet and dust with flour.
6. Bake at 180°C (350°F) for 15-20 minutes until golden brown.
7. Serve hot with sour cream or fried onions.