For St. Louis, my favorites have to be fried ravioli, gooey butter cake, and concretes.
My favorite from when I lived in New Mexico has to be green chili stew.
From my grandmothers (in North Carolina), fried cornbread, chicken & pastry, and country ham biscuits.
Fried green tomatoes are more of a regional thing, but I found a BBQ restaurant in Florida that makes them (and they are so tasty).