Combine all the breading ingredients and set them aside
Combine Aioli ingredients, this can be made ahead and stored in the refrigerator
Heat a pot for frying, once pot is close to frying temp, drain seitan and remove from package.
Add seitan pieces to non-dairy buttermilk. Then dredge seitan pieces in the black pepper breading mixture and repeat.
Drop breaded seitan into the oil to fry. While seitan is frying prepare your burger. Heat bun if desired, slather aioli on the top and bottom. Remove golden brown seitan from oil and let drain.
Build sammie with the tomato, lettuce, and pickles.