Olivier salad the dressing — was a jealously guarded secret, but it is known that the salad contained grouse, veal tongue, caviar, lettuce, crayfish tails, capers, and smoked duck, although it is possible that the recipe was varied seasonally. The original Olivier dressing was a type of mayonnaise, made with French wine vinegar, mustard, and Provençal olive oil; its exact recipe, however, remains unknown. At the turn of the 20th century, one of Olivier's sous-chefs, Ivan Ivanov, attempted to steal the recipe. While preparing the dressing one evening in solitude, as was his custom, Olivier was suddenly called away on some emergency.
Russian dressing 1927 biographical article calls him "the originator and first producer of that delectable condiment known as Russian salad dressing". Colburn had been selling "Colburn's Mayonnaise salad dressing" at his store since at least 1910. Certainly by 1914, Colburn's company was manufacturing it, and distributing it to retailers and hotels. He earned enough from its sale that he retired in 1924. It is unknown in traditional Russian cuisine, but Russians call it "ketchunnaise" (кетчунез). Typically piquant, it is today characteristically made of a blend of mayonnaise and ketchup complemented with such additional ingredients as horseradish, pimentos, chives, and spices. Besides being