Saffron: Literally the dried stigma from Crocus sativus, saffron is the world’s most expensive spice. Each crocus produces only 3 stigma, requiring over 75,000 flowers for each pound of saffron. Fortunately, a little goes a long way. It’s used sparingly to add golden yellow color and flavor to a wide variety of Middle Eastern, African and European-inspired foods. Find it in the specialty-herb section of large supermarkets, gourmet-food shops and tienda.com. Wrapped in foil and placed in a container with a tight-fitting lid, it will keep in a cool, dry place for several years.