Cut tomatoes into 1/4-inch slices. Pat dry with paper towels and season well with salt and pepper.
Place flour in a shallow dish or pie plate, or for easy clean-up use a paper plate.
Whisk together eggs and buttermilk in a shallow dish or bowl.
Combine Panko crumbs and cornmeal in a shallow dish or pie plate, or for easy clean-up use a paper plate.
Preheat air fryer to 400 degrees.
Coat the tomato slices in the flour, dip in egg mixture, and then press panko crumb mixture into both sides. Sprinkle a little more salt on them.
Mist air fryer basket with oil and place 4 tomato slices in basket. Mist the tops with oil. Air-fry for 5 minutes.
Flip tomatoes over, mist with oil and air-fry 3 more minutes.
Serve with Comeback sauce if desired.