Yacon, yeah

Yacon, a root vegetable is a high fibre, low-calorie food with beneficial prebiotic and probiotic bacterias which are thought to aid in digestion and gut health. It looks like a small sunflower.  It grows on very long stems.

The yacón is a species of daisy traditionally grown in the northern and central Andes from Colombia to northern Argentina for its crisp, sweet-tasting, tuberous roots. Wikipedia

Scientific name: Smallanthus sonchifolius

Family: Asteraceae

Genus: Smallanthus

Order: Asterales

I've heard it called "Peruvian Earth Apple".  We normally eat it raw.  Leave it for a week after harvest and the white flesh turns the colour of rockmelon.  It is crunchy like an apple, juicy like a pear, but not too sweet.  The inulin contained therein is good for diabetes, and weight loss.

Watch out

Don't eat too much at once.  It is a prebiotic and behaves like a laxative if you eat too much.