Sweet potato is one of my favourites. I even like them just boiled with a touch of salt.Even the leaves are edible but I have so far not tried using them. We have tried growing sweet potato in our garden. I did succeed once and got about 2 kilos. We have the mongoose menace who attack the moment they 'smell' the formation beneath. Last time it was a total failure. We have once again planted and hope to succeed. The moment we 'smell' a mongoose we shall protect the patch.
(Image credit http://commons.wikimedia.org/wiki/File:Sweet_potatoes.JPG)
Mongooses in action - do not disturb
(Image credit http://commons.wikimedia.org/wiki/File:Sweet_potatoes.JPG)
Mongooses in action - do not disturb