Sweet potato leaves ('mtoriro') are one of the foods that you find sometimes when you live in Zanzibar, but don't tend to come across as a tourist much. But these young leaves are really tasty and nutritious and can be used instead of spinach ('mchicha'). Ask around for them if you are in Darajani market near Stone Town - small bundles of arrow shaped green leaves you buy in bunches and which are wrapped up in newspaper for you to take home.
When you get them home, strip of the bigger rougher stems, wash the leaves and then put them out in the sun for a couple of hours to dry out. Read more »