I have another recipe on here that is for a seitan sloppy joe, and I made almost the same dish, but didn't chop everything as finely and it turned out completely different.
The sloppy joes recipe
is very easy, and this stir fry is almost the same thing, but with large chunks of veggies and seitan and served over rice.
You just start with about six cutlets of seitan and cube them about 1/2 inch in size. Roughly dice a pepper and an onion and fry the veggies in a heavy pan.
Mix in the seitan cubes and barbecue sauce until it is all thoroughly mixed. Let the mixture sit in the pan and burn a bit on the bottom of the pan. Scrape it up into the rest as you mix so that you are incorporating the slightly burnt barbecue sauce into the flavor and texture of the overall meal.
Once you've heated this mixture sufficiently to your level of burnt-ness, serve it over cooked rice and top with some sweet-and-sour sauce.
You can try bringing some heat and using some finely chopped habanero pepper as well, if that's your style.