The subtitle is "How African food changed America" or something very similar. Looks fantastic. Here's a link to the trailer:
https://www.netflix.com/extras/81301955?trkid=13710079&MSG_TITLE=81301955&lnktrk=EMP&g=DD7D88A7C9500CC16D7CC2347C197FF564555724&lkid=PRIMARY_TRAILER_CTA