Anyone living in or even visiting Japan will likely have come across a certain ghastly, grey, gelatinous substance.

In most cases, local people are at a loss to answer the questions that inevitably follow. An enigma of the food world, konnyaku is either loved or detested. There is no in-between.

This mysterious food is derived from the corm (the bulbous underground stem) of the konjac plant, which goes by such intriguing monikers as ¡°devil¡¯s tongue,¡± ¡°voodoo lily,¡± ¡°elephant yam¡± and ¡°snake palm.¡± Hints, perhaps, to the nature of the consequent product.