Sumac is an oriental spice made from the young berries of the tannic sumac plant. The berries are dried and ground. The result is an unusual red-burgundy seasoning with a sweet and sour berry taste. Sumac is used in the cuisines of eastern countries. And in the Caucasus, for example, it is added to the marinade for shish kebab. We offer you a recipe for delicious pickled onions with sumac. The appetizer is perfect with meat, fish and vegetable dishes.