Proziaki

Proziaki , also known as sodziaki and dialectally prozioki or prołzioki, are a Polish type of soda bread, originating in the foothills and mountainous areas of the Carpathians in south-eastern Poland. Their preparation involves making small flour-based rolls with added sodium bicarbonate (known as proza in the regional dialect) and soured milk or kefir. Proziaki are traditionally produced by the use of wheat flour or wheat-rye flour, soured milk, salt, and a maximum of one tablespoon of sodium bicarbonate; they were traditionally baked on clay, cast iron, or tiled stovetops (nalepa) heated by firewood. Some recipes may call for eggs, śmietana (sour cream), or water to be added, or may substitute the baking soda with baking ammonia and/or soured milk with kefir. Sweet variants can be made with the addition of sugar. Proziaki can be circular shaped (diameter of 6-10 cm, thickness ca. 1.5 cm) or quadrilateral. Presently, most proziaki are baked in an oven pan with a small amount of fat or lard (smalec).

Source: Wikipedia