Zereshk is the berries of an edible species of barberry shrub. The berries are tiny red, sour fruits that are sold in dry form in most Middle Eastern markets. Pick through them carefully and rinse them under cold water before use.
Garlic chives (tareh in Persian cuisine, Nira with slightly narrower leaves, in Asian cuisine), has narrow leaves and is very closely related to the leek family. If unable to find this herb in the regular supermarkets you may substitute the green parts of the scallions instead and cut them into ¼-inch slices. The other option is to use leeks and cut them into ⅛-inch slices. Use only light-green and tender green parts of the leeks.
Rice Spice is a blend of cinnamon, cumin, cardamom, nutmeg and optional dried rose petals.