Drain your jackfruit and steam in a steamer basket for 12 minutes.
While your jackfruit is steaming, combine all the ingredients for the dry mixture in one bowl, and all the ingredients for the wet mixture in another bowl. Transfer the wet mixture to a measuring cup. You should have about 2 cups of the wet mixture.
Now is a good time to preheat your oven to 350 degrees Fahrenheit.
Once your jackfruit is steamed, mash it with a potato masher or chop it up with a knife until it is finely shredded. You can take out the seeds and tougher parts if you like, but I didn't find this necessary.
Combine the shredded jackfruit with the dry mixture. Then add half of the wet mixture (should be about 1 cup).
Stir the seitan mix first with a wood spoon, and then once it's combined, knead in the bowl with your hands. This type of seitan will be looser and wetter than typical seitan, but if it's so wet it won't stick together, add a tablespoon of vital wheat gluten at a time and knead in until it forms a ball.
Take the seitan dough out of the bowl and knead with your hands for a minute or so on a cutting board lined with wax or parchment paper. Flatten the seitan to the thickness of a McRib and divide into 6 equal portions. I found a scale useful for this and divided them into roughly 3.5 ounce patties.
Shape the seitan pieces into McRib patties. Use your hoagie roll as a guide for the length and width of your patties. Make sure to do this on top of the wax or parchment paper as well to prevent sticking.
Once all your patties are formed add them to a lightly greased baking pan. Cover them in the rest of the wet mixture to braise.
Bake them at 350 degrees F for 50 minutes, flipping halfway through. If after the first 25 minutes your braising liquid has mostly evaporated, add some water so they don't dry out. The patties will still be delicate so flip and handle with care!
Once your patties are cooked through, heat up a skillet with a bit of oil.
Brush your patties with some of the BBQ sauce and grill for about 2-3 minutes. Then flip them and brush with more sauce. Grill for another 2-3 minutes. Some charring is not only natural but encouraged! That's flavor!
Once your patties have been grilled on both sides, brush with some more BBQ sauce, add to a toasted hoagie roll with pickles and onions, add more sauce if you want, or anything else your heart desires and DIG IN!!
ENJOY!