Zanzibari cooks judge a good biryani by how distinctly separate each rice grain stays after cooking; a mushy pot is considered a kitchen failure.
Layers of fragrant rice and spiced meat, perfumed with cloves, cinnamon and cardamom, are cooked together until the flavors meld, then served with kachumbari and a wedge of lime. On Zanzibar it's centerpiece food for weddings and Eid celebrations, and it also turns up at Forodhani Gardens' night food market.