Famous Russian Salad - Olivier salad

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. Taking advantage of the opportunity, Ivanov sneaked into Olivier's private kitchen and observed his mise en place, which allowed him to make reasonable assumptions about the recipe of Olivier's famed dressing.