Russian Potato Vareniki with Smetana

Method

1. Boil potatoes until soft, then mash them.
2. Sauté onion in butter until translucent.
3. Combine mashed potatoes, sautéed onion, salt, and pepper.
4. Mix flour and egg to form a dough.
5. Roll out the dough and cut into circles.
6. Fill each with potato mixture, fold, and seal.
7. Boil in salted water until they float.
8. Serve with sour cream and fresh parsley.