@natecull Well, for one, "Sichuan pepper" is not related to chili peppers and was around before!
But /r/AskHistorians has a lot of cool stuff about world cuisine before the Columbian exchange. E. g. https://www.reddit.com/r/AskHistorians/comments/11kijb/what_were_some_old_world_cuisines_like_before_the/
AFAIK, tomatoes are more of an Italian-American thing: https://www.saveur.com/article/Travels/Italian-American-Food