Kale, a broad, leafy, robust-stemmed green, is a form of cabbage and in the Brassica family. It is used worldwide, and can be sautéed, stewed, steamed, frozen, or even used raw in green smoothies or when young and tender in salads. Kale is a super food, high in antioxidants, vitamins K and C, calcium, beta carotene, and iron. Use it in any recipe that calls for leafy greens.