You just need some seitan (preferably homemade, recipe here), some store bought BBQ sauce, some crusty white bread, and some cabbage and vegennaise!
Toast your bread. Slice your seitan and heat in a skillet with BBQ sauce (or just throw in the microwave!) and whip up some coleslaw!
For the coleslaw, I don't want to give quantities because every cabbage is different. If you have a huge cabbage then perhaps the recipe won't allow you to use as much "vayo" as you really should. And then you'll be like "this coleslaw is terrible!" And then maybe you won't keep coming back to my blog. So I'll take the leap of faith that you can tinker with the quantities to get your coleslaw just right. Here's what I put in mine:
Diced green onions
Apple cider vinegar
A bit of sugar
A touch of salt