Pierogi! (correct plural) My number one fave food. But none are ever quite like my mum's. Eat with lashings of melted butter.
The Lituanian shop has frozen ones, but they are pretty average, and I cant seem to manage to cook them without them falling appart.
I did not see them in the place on the OKR.
The other place that had them very briefly is the health food shop on Lower Marsh. They were made and frozen by a Polish lady and were very good. They were sold there briefly but I have not seen them there for years.