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A root vegetable with a crunchy texture and slightly bitter flavor. It's also known as Chinese potato and swamp potato, the latter name coming from the fact that it's grown under water. Choose roots that are firm and free of blemishes. Refrigerate in a plastic bag for up to 2 weeks; peel before using. Arrowhead is best cooked by braising, boiling or steaming and can also be added to soups.