Cassava too, native to South America, a staple food or costaple in much of Africa especially in drought susceptible parts like sub-Sahara.

Its also quite important to many parts of Asia.

Edit: the impact of the columbian exchange on the world doesnt get enough attention.

(Video for columbian exchange cassava crash course world.history) https://www.youtube.com/watch?v=HQPA5oNpfM4