What does dried yacon taste like? It is a bit difficult to describe but I'll do my best. It is a tuber like the potato, but it has a subtle bit of melon-like sweetness to it (but not too much, nothing close to the sweetness of a goldenberry). The petal-like pieces remind me a bit of a dried apple, but more rooty. :) The best way to really find out is to try it.
Yacon is really low calorie. It comes in powder and syrup form, but I'm really into the dried yacon as a healthy snack. One ounce (which is a lot since it is so fluffy) is 90 calories, 1 gram of protein and 1 gram of fiber. Technically this is 2 weight watchers points, although much of the carbs in the yacon root are in an undigestible form, so it is in reality probably fewer calories/points. Dried yacon is sold by a few companies including Terramazon and Navitas Naturals. I buy it at Whole Foods.