Remove the outer papery skin from the head of garlic and then trim off the top of the head to expose the tops of the garlic cloves. Drizzle with the olive oil and wrap in foil to make a packet.
Bake at 375°F for about 40 minutes until the garlic is soft. Let cool.
Turn the oven to 350°F. Squeeze the roasted garlic out of the cloves into a food processor and add the first amounts of broth, barbecue sauce, and canola oil, the tamari, nutritional yeast, smoked paprika, and salt. Process until smooth. Add the vital wheat gluten to the food processor and process until it forms a dough ball.
Turn the dough ball onto the counter and knead a couple of times by hand. If it is sticky let rest for 5 to 10 minutes for the gluten to absorb the liquid. Divide the dough in half and shape into two about 1-inch thick disks.
Heat a large skillet over medium and add the second amount of oil. Fry each large seitan patty until browned, about 2 to 3 minutes on each side.
In a 9x13-inch baking dish, combine the second amounts of broth and barbecue sauce and whisk until smooth. Add the browned seitan patties, flipping to coat in the sauce. Cover the baking dish with aluminum foil.
Bake for 30 minutes. Remove from oven, flip seitan patties and spoon sauce on top of the patties. Re-cover with the foil and bake an additional 30 minutes. Let the seitan rest until cool enough to handle. You can refrigerate the seitan patties in the thickened sauce until ready to grill, or grill right away.
Slice each piece of seitan into about 8 ribs. Heat an outdoor grill, grill pan, or skillet over medium heat. Brush with oil, then lay each strip of seitan onto the grill. Cook to get the charred grill marks, flipping to brown each side. When all sides are cooked, brush with the third amount of barbecue sauce, turning to coat each side. Serve immediately and enjoy!
This nutritional information refers to each serving of the entire recipe and not just the products used as ingredients.