Karjalanpiirakka

Karelian pasties, Karelian pies or Karelian pirogs are traditional Finnish pasties or pirogs originating from the region of Karelia. They are eaten throughout Finland as well as in adjacent areas such as Estonia and Russian Karelia. The oldest traditional pasties usually had a rye crust, but the North Karelian and Ladoga Karelian variants also contained wheat to improve the quality of the crust. The usual fillings were barley and talkkuna. In the 19th century, first potato, and then buckwheat were introduced as fillings, and later, boiled rice and millet. Today, the most popular version has a thin rye crust with a filling of rice. Mashed potato and rice-and-carrot fillings are also commonly available. Butter, often mixed with chopped-up boiled egg (egg butter or munavoi), is spread over the hot pasties before eating.

Source: Wikipedia