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.
Jello salad appearance. The "salad" theme continues in variants containing mayonnaise or salad dressing. When one uses plain gelatin instead of sweetened gelatin, then the use of vegetables becomes more common, such as in tomato aspic. The name comes from the brand name Jell-O, a common gelatin product. Jell-O salads are a common feature of US communal meals such as potlucks, most probably because they are inexpensive and easy to prepare. The origins of Jell-O salad can be traced back to a dish called Perfection Salad, by Mrs. John E. Cook of New Castle, Pennsylvania, which won third prize in a Better