This is a popular cold dish in Russia, but was actually crated by a Frenchman, Monsieur Olivier, at his Moscow restaurant, L'Ermitage, in the late 1800's. He then went on to cook for Russia's last czar, Nicholas ll. The original recipe called for 6-8 oz. chicken,diced, but I have left it out, to make this vegetarian. Feel free to add the chicken back in, if you like!