“Kefir”

If you’ve not tasted this delicious Middle Eastern beverage, it can be described briefly as one of the family of cultured milk products that includes yogurt, buttermilk, and sour cream, but it resembles none of them. (We quote the term “kefir” because the kind available in this country isn’t identical with the original version, which is not imported.) It is thin as buttermilk but smooth, not curdy, and has a less acid fla