Cooks leave a small hole in the top and pour a spoonful of hot broth through it partway through baking, keeping the raw-diced meat and potato filling juicy.
Echpochmak is a triangular hand pie of yeasted or short pastry stuffed with diced meat, potato, and onion, baked until the crust turns deep golden and the filling steams inside its sealed shell. Bakeries around Kazan sell them warm, wrapped in paper, as a grab-and-go lunch.