Russian refugees carried pirozhki as far as Japan, Argentina and Iran
Pirozhki are small boat-shaped buns of yeast dough, baked or fried around a filling. The name means little pies. Revolution and emigration scattered them across the world, so today you can find a panko-crusted version in Japan, a cream-filled one in Iran, and a cousin called runza on the American plains.
The Russian word is a diminutive of pirog, a full-sized pie, and both come from the old Slavic root pir, meaning feast or party. That makes pirozhki cousins of Polish pierogi, but the two are different foods: pierogi are boiled dumplings of unleavened dough, while pirozhki are leavened buns with the filling sealed completely inside. Savoury versions hold minced meat, mashed potato, mushrooms, cabbage, or chopped egg with spring onion; sweet ones take apple, cherry, apricot, jam or curd cheese. Baked ones are often brushed with egg for a golden finish.
The food historian Darra Goldstein describes pies as everywhere in Russian life and literature, from street vendors with portable ovens to cafes serving them beside soup, and cites Gogol's Evenings on a Farm Near Dikanka as an example of their place in fiction.
Their travels followed history. Volga Germans took early versions to the Americas, where they survive in the United States, Canada and Argentina as bierock, pirok or runza. Later waves of emigrants, after the revolution and civil war and again after the Soviet collapse, brought the classic Russian forms. White Russian refugees who reached Japan after 1917 introduced a dish that became piroshiki, usually coated in panko and fried like a meat cutlet; a curry-filled variant resembles kare-pan, a bun said to have been inspired by it.
Around the old empire's edges each region adapted the idea. Pontic Greeks brought fried piroski to northern Greece, once sold in dedicated shops, with feta or kasseri inside. Serbian piroshka is cylindrical, Latvian speka piragi are crescents stuffed with smoked fatback and onion that farmers and shepherds ate in the fields, and in Iran pirashki most often hold pastry cream. Across Central Asia and Mongolia they are everyday street food, introduced by Russians and now made at home.
Source: Pirozhki