Czech Mushroom and Onion Pierogi

Method

1. Mix flour and salt, add egg and water, then knead until smooth. Let rest.
2. In a pan, sauté mushrooms and onions in butter until tender.
3. Divide the dough into small portions, flatten, and fill with the mushroom-onion mixture.
4. Fold and seal the dumplings, then cook in boiling water until they float.
5. Serve with a side of sour cream or fried onions.