Turnips have been a popular vegetable since Roman times. This white root is a prized vegetable in many cuisines and is used a lot in French and Japanese cooking. Varieties vary in size and shape with roots being generally round or a flattened globe shape. Turnips have a delicate peppery flavour and are best eaten when young and tender, older turnips have a stronger flavor. Turnips are a good source of calcium and also contain some vitamin C and fiber.