Seitan & Vegetable Stir-Fry with Black Bean Sauce

You can throw together this colorful plant-based stir-fry in minutes. Chewy seitan, made from cooked wheat gluten, takes the place of meat, and umami-rich black bean-garlic sauce helps make a quick, deeply flavorful seasoning sauce. Bok choy is a wonderfully crunchy, authentic presence in this dish, but if you can’t find any, sub in a few stalks of baby broccoli.