Wikipedia
Qistibi
Qistibi is a popular traditional dish in Tatarstan and Bashkortostan. Qistibi is roasted flatbreads with various fillings inside. The dough should be non-fermented. The most popular filling is mashed potato but it may also be ragout or millet. Filling is placed on the one half of the flat cake and is covered by the other half. Later, clarified butter is spread on the flat cakes.