Ngaku crisps, anyone?

THEY are crunchy, tasty and addictive. Once you start crunching on ngaku (arrowhead) crisp, it's hard to stop. These crisps, which look like potato chips, are made from the ngaku, a tuberous vegetable from China which has a woody taste. 

Also known as Chinese potato or swamp potato because it grows in water, the ngaku is only available during the Chinese New Year celebration as it is a seasonal vegetable.