In a medium bowl, whisk together the vital wheat gluten, nutritional yeast, garlic powder, onion powder, sea salt, and black pepper.
Pour in the vegetable broth and stir until a dough forms; knead for 2-3 minutes to develop the gluten texture.
Tear the dough into bite-sized medallions and steam them for 15 minutes until firm and slightly expanded.
Pat the steamed seitan dry, toss with cornstarch until lightly coated, and mist with avocado oil.
Air fry at 400°F for 10-12 minutes, shaking halfway through, until the exterior is golden and crispy.
While the seitan cooks, whisk the maple syrup, sriracha, and apple cider vinegar in a small bowl to create the glaze.
Steam the broccoli florets until bright green and tender.
Toss the hot seitan in the spicy maple glaze until fully coated and serve immediately with the steamed broccoli.