I just took a look at your site and found Goodnoe's in Newtown, PA. This is one of my favorite reasonably-priced restaurants in the world.

Great food, fantastic ice cream, and priced so that a family of six can have lunch there without thinking twice.

Of course, it is not strictly budget travel food. For that, you would have to find us a good cheesesteak van that works one of the Philly street corners.