I looked in _Uncommon Fruits & Vegetables A Commonsense Guide_ by
Elizabeth Schneider for an answer to your question. She doesn't mention
any poison in malanga when eaten raw or boiled or cooked any other way.
BUT she also says that there's enormous confusion about what actual
vegetable is being talked about with that name so you might be thinking
of something very different. Try to find out the Latin name of your
vegetable. That will help you research safe cooking methods.
Xanthosoma species is the one Schneider is refering to.

--Lia


Robert Sutherland wrote:
> Will microwaving instead of boiling Malanga, destroy the poison in it?
> I did a Google search on the subject, but couldn't find anything
> written about it. Does anyone have any microwave Malanga recipes
> they'd be willing to share? I'd just like to know if it's safe to eat
> microwave Malanga.