Slice the tomatoes into ¼-inch rounds. Lay them out on paper towels and pat them dry.
Season the slices with salt and pepper on both sides.
Set up three shallow bowls: one with flour, one with beaten eggs and buttermilk, and one with a mix of cornmeal, panko, and spices.
Dredge each tomato slice first in flour, then egg mixture, then the cornmeal-panko mix.
Heat about ½ inch of oil in a skillet over medium heat until shimmering.
Fry the tomato slices in batches for about 2-3 minutes per side until golden brown.
Transfer to a paper towel-lined plate to drain excess oil.
Serve warm with your favorite dipping sauce or just a sprinkle of sea salt.