Cepelinai with Mushroom Filling

Method

1. Boil potatoes until tender, then mash them.
2. In a pan, cook onion and garlic until softened.
3. Add mushrooms and cook until tender.
4. Mix mashed potatoes with cooked mushroom mixture, egg, breadcrumbs, salt, and pepper.
5. Form into large dumplings and cook in boiling water until they float.
6. Serve with sour cream and butter.