Also referred to as Swiss chard, this member of the beet family is grown for its crinkly green leaves and silvery, celerylike stalks. The variety with dark green leaves and reddish stalks (sometimes referred to as rhubarb chard ) has a stronger flavor than that with lighter leaves and stalks. There’s also a ruby chard, which has a bright red stalk and a deep red (tinged with green) leaf. Chard is available year-round but best during the summer. Choose it for its tender greens and crisp stalks. Store, wrapped in a plastic bag, in the refrigerator for up to 3 days. The greens can be prepared like spinach, the stalks like asparagus. Chard, a cruciferous vegetable, is a good source of vitamins A and C, as well as iron.