You must boil it three times to remove the toxins. I have never had it, but would certainly try it at the hands of an experienced cook. Do not forget that taro is also toxic until cooked and potato peels are likely worse. Toxic goes with most plants and cooking hugely expanded mankind's ability to exploit a wide range of options.
We are now re-investigating every plant out there and well we should. Recall that goats eat just about everything and that means a biochemical process exists to temper all threats.
We will be surprised just how many attractive dishes are out there to be discovered and created.