Beef Stroganoff are considered the traditional side dish for beef Stroganoff in Russia. The version given in the 1938 "Larousse Gastronomique" includes beef "strips", and onions, with either mustard or tomato paste optional. After the fall of Tsarist Russia, the recipe was popularly served in the hotels and restaurants of China before the start of World War II. Russian and Chinese immigrants, as well as US servicemen stationed in pre-Communist China, brought several variants of the dish to the United States, which may account for its popularity during the 1950s. It came to Hong Kong in the late fifties, with Russian restaurants
Milk and meat in Jewish law 24 hours of being used to cook meat (and vice versa). Although, after 24 hours, some residual flavour may still reside in porous cooking vessels and utensils, some rabbis hold the opinion that such residue would become stale and fetid, hence only "infusing taste for the worse" (Hebrew: "nosen taam lifgam", נותן טעם לפגם), which they do not regard as violating the ban against mixing the tastes of milk and meat. Since "parve" food is reclassified if it takes on the flavour of meat or dairy produce, Ashkenazi Jews traditionally forbid eating "parve" contents of a pot that has been