This is a super meaty tasting vegetarian and vegan seitan strips recipe that you can use as a meat substitute for just about anything. Add these seitan strips to stir-fries, chinese food recipes, vegetarian sub sandwiches or just gobble up right out of the pan. The combination of ingredients used to turn plain seitan into a meaty-flavored substitute may seem a bit odd, but the salty soy sauce, tangy and full-bodied balsamic vinegar and sweet barbecue sauce all combine for a meat-like flavor in this vegetarian and vegan seitan recipe.