In the 1960's we lived on an Air Force base in Tokyo, and my parents would go to a small restaurant downtown, owned by a Russian gentleman, and get an order of borscht and piroski(sp?). The owner promised to give my mother recipes for both when they left for the states, but only gave her the piroski recipe - she experimented with years to make the borscht she remembered, but I don't think she ever did. I don't even know if it's authentic, but she would make piroski once in a while. Looking at the recipe, there's not a lot to the filling, ground meat, onion, and chopped boiled egg, rolled into a smaller version of an eggroll and deep fried. She would put out small bowls of catsup, and hot mustard (Coleman's mustard mixed with ice water) for dipping.