Whisk together seitan dry ingredients and jackfruit until combined. Add the 1 cup of broth and stir until it forms a dough ball.
Knead a few times with your hands until dough has no dry spots.
Add rest of broth to instant pot. Rip into 5-6 equal chunks of seitan and flatten into a "chicken breast" shape (it's okay if they look small as they expand when cooked quite a bit!). Add to pot. Cook on "manual" for 15 minutes. Once it is done, quick release steam. *** if you don't have an instant pot, steam the seitan patties by the same method in a shallow pan or pot for 35-45 minutes.
Meanwhile, whisk together breading ingredients.
Remove seitan from pot and dip in breading mixture until thoroughly coated.
Heat a large frying pan with a good amount of oil. When hot, add seitan and fry a few minutes per side until crispy and golden brown.
Remove from pan and plate into a paper towel-lined bowl to remove excess grease. Repeat with remaining pieces. *** for lower calorie option, air fry with spray oil until crispy on the edges.
Assemble the sandwich with 1 tbsp of vegan mayonnaise, fresh buns, and lettuce. Enjoy!
