Potato and Cheese Dumplings with Butter Fry

Method

1. In a bowl, mix flour and salt. Add egg and milk, then knead until smooth. Cover and let rest.
2. In a separate bowl, mix mashed potatoes, cheese, and chopped onion.
3. Divide the dough into small balls, flatten into circles, and fill with the potato-cheese mixture.
4. Fold the dough over the filling, seal the edges, and cook in boiling water until they float.
5. Fry the cooked pierogi in butter until golden brown. Serve warm.