Georgian Pickled Plum Sauce

A deliciously tart table sauce made with sour plums and cilantro, tkemali is the Republic of Georgia’s answer to ketchup. Pronounced tek-MA-lee, it accompanies everything from grilled sausages to fish. Since dark red tkemali plums are very sour, I suggest using the large underripe red plums found at most American supermarkets. They work well for this recipe. You can also use other tart fruits, like rhubarb (see Note).