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.
Salad greens. Mary, Queen of Scots, ate boiled celery root over greens covered with creamy mustard dressing, truffles, chervil, and slices of hard-boiled eggs. Oil used on salads can be found in the 17th century colony of New Netherland (later called New York, New Jersey and Delaware). A list of common items arriving on ships and their designated prices when appraising cargo included "a can of salad oil at 1.10 florins" and "an anker of wine vinegar at 16 florins". In a 1665 letter to the Director of New Netherland from the Island of Curaçao there is a request to send