"This classic beef dish is named after Count Stroganoff, a nineteenth-century Russian diplomat and scion of a wealthy family that owned vast tracts of land and salt refineries in the Urals and later led the conquest of Siberia. It was Count Stroganoff who popularized the family dish in the rest of Europe. You can use top sirloin or tenderloin tips instead of beef tenderloin, and farm-raised mushrooms instead of the wild mushrooms called for in the recipe; in a pinch, use them instead of all the other types, but using several varieties of mushrooms adds to the interesting complexity of flavor in the dish...."