Preheat the oven to 375°F/190°C and grease a 9"x13" baking dish with oil. Set it aside.
In a medium skillet, heat olive oil over medium heat and sauté the mushrooms until they become soft and most of the liquid evaporates, approximately 8 to 10 minutes.
½ lb mushrooms, 4 tablespoon olive oil
Transfer the cooked mushrooms to a blender or food processor. Add broth, peanut butter, soy sauce, liquid smoke, and tomato paste. Pulse until the mixture becomes smooth and well combined.
1 ½ cups mushroom broth, ¼ cup dark soy sauce, 2 tablespoon peanut butter, 1 tablespoon tomato paste, ⅓ tablespoon liquid smoke
In a large bowl, whisk together 2 cups of vital wheat gluten, salt, garlic powder, and onion powder. Reserve the remaining gluten for later use if necessary.
2 ½ cups vital wheat gluten, 2 teaspoon paprika, 2 teaspoon garlic powder, 1 teaspoon onion powder, 1 teaspoon salt
Add the blended mushroom mixture to the dry ingredients and mix until a dough forms. If the dough is too sticky, add more vital wheat gluten as needed.
Stretch the dough evenly into the prepared baking dish.
Bake for 30 minutes, then remove from the oven and let it cool.
Once the dough is cool to the touch, cut it into small rib-shaped pieces.
Heat a grill pan or outdoor grill and brush the dough "ribs" with olive oil. Grill them for approximately 1 minute on each side until they are nicely browned.
Brush the "ribs" with barbecue sauce and continue grilling for another 1 to 2 minutes per side until they caramelize.
1 ½ cups barbecue sauce