3. Rice
While rice is able to be grown quite well on foreign non-African soil, African slaves are the ones credited with teaching foreigners (Americans to be precise) how to properly irrigate a rice field and thus grow rice.
4. Curry
This is one of the most widespread spices in the world and though it is largely identified with the Asians, its origin can be traced to Africa from the time of early railway construction to Uganda, when the British imported a lot of Indians who came to Africa with curries.
