Lemons are bright yellow citrus fruits with juicy, segmented flesh and aromatic, slightly oily zest. Their flavor is sharply tart and refreshing, while the flesh is tender and juicy. In many eastern cuisines, lemon juice and zest add brightness to marinades, sauces, curries, drinks, and fish dishes; preserved lemons are especially important in North African cooking. Lemons have long been valued for both their flavor and their ability to help preserve food.