I just came across the first picture below that I took of tiger nuts on sale in Japan on my visit in spring 2016…Super Food…there are 3 types: peeled, unpeeled and bio-peeled (whatever that means?)
The second picture is of a commercial packet I bought in a supermarket in Oregon, USA in September 2015.
See also http://www.edimentals.com/blog/?p=7725
Not a bad yield considering the size of the plants…this is the yield of one large pot with two plants grown inside. Chufa / tiger nuts (Cyperus esculentus) has very tasty tubers! You can read more on my friend Alan Carter’s excellent blog (Aberdeen): https://scottishforestgarden.wordpress.com/2013/12/03/chufa-tigernut
Perennial vegetables, Edimentals (plants that are edible and ornamental) and other goings on in The Edible Garden