Slice Beef Into Very Thin Strips. Heat Half The Oil In Skillet Over Medium-High Heat. Cook Beef Until Browned, Stirring Often. Set Beef Aside. Add Remaining Oil. Add Onion And Cook Over Medium Heat Until Tender. Pour Off Fat. Add Soup And Paprika. Heat To A Boil. Stir In Sour Cream And Return Beef To Skillet. Heat Through. Serve Over Noodles. Sprinkle With Parsley.