Similar questions have found answers in these threads:
https://www.reddit.com/r/AskHistorians/comments/3m6cyu/what_kinds_of_street_food_would_of_been_available/?st=jpuc8f5v&sh=8b82c12d
https://www.reddit.com/r/AskHistorians/comments/4q6mgp/im_sitting_here_eating_chips_did_the_people_of/?st=jpuchlob&sh=8e91377d