RoadFood.com is an inspiration and a very useful resource, especially for travellers. They’ve been publicizing and thus rescuing hinterlands restaurants for decades.
Jane and Michael Stern are a husband and wife team who’ve published books on a wide variety of grassroots Americana, but the focus of their website is food.
(They’re a model for my Local Spirit forums and sticker. The LS approach is meant to give more state-by-state details, and to be broader and wider in impact—a sticker helps break out from the directories. And I include more than food.)
https://RoadFood.com