a couple of weeks ago i harvested our six bolivian sunroot plants. after our very delayed first frost and the stalks have withered and succumbed to the cold, sweetening just so slightly the tubers in the soil.
to cure the yacon, you leave them in the sun for a few days. i didn't have this option for the desperate frenzy of squirrels before the snow.
to store, keep them in dry sand in a dark dry space such as a cellar, basement or garage.