Olivier is popular in the former USSR countries winter salad. It is regularly served at Ukrainians' New Year table on par with dressed herring and meat jelly.
The salad combines several interesting ingredients: boiled vegetables, eggs and meat. Meat choice may vary - from poultry to pork. Some housewives add beef tongue instead of meat in order to make the salad especially tender. Regarding boiled vegetables - potatoes and carrots - they must get cold (indoor temperature) before getting in salad, otherwise they lose their taste.
Olivier is regularly seasoned with mayonnaise. Afterwards the salad should stand for a while, and only then you may put it in fridge and then serve.
Olivier is traditional festive dish, but sometimes it is also served to everyday table.