These are third party reccos, so consider the following as research fodder rather than valuable tippage. Any comments, negative or positive, welcome, as well as additions to the list (let's make a monster resource!)
Littleton Diner (Littleton,NH.) Excellent Sunday supper, breakfast probably good, too.
The turkey farm restaurant in Laconia, NH cooks their own turkeys and their own potatoes, and while I've not heard that they serve breakfast, it sounds like it'd be great if they did.