Sunchokes

Helianthus tuberosus. A native American perennial sunflower, less showy than garden varieties which grow to ten feet tall. These plants are too invasive for your vegetable garden and would require a plot of their own. Dig the tubers, which grow in a circle around the root, after the first frost and store in the refrigerator. Sunchokes contain Insulin and are therefore supposed to be for diabetics.