There's as many variations in the basic recipe as there are cooks. I usually just coat with a half & half mix of corn meal & flour (now use gluten free flour cause my daughter's a celiac) with a bit of seasoning (both mixed into said breading and sprinkled on the tomato slices before coating.
Others use bread crumbs. Some soak the tomato slices in buttermilk first. Most serve with a salad dressing to pour over the hot fried slices; the most common are:
-Ranch Dressing
-Bleu cheese Dressing
-Vidalia Onion Dressing
recipe variation I don't like