Thanks to following the @ScienceDaily@newsbots.eu bot on mastodon, I recently learned that Mexican food, with its many uses for different hot peppers, may be one of the world's oldest cuisines.
Plus, most pre-Columbian protein apparently came from easy-to-harvest insects like ants, grasshoppers, manuey worms, & jumil bugs. There was also super useful blue algae that was harvested with nets.
I collated more information about the history of food for my newsletter if you're curious: https://newsletter.eleanorkonik.com/cuisine/