Seitan is frequently used as a meat substitute because of its versatile and meaty texture. It readily takes on the flavor of marinades and sauces, making it very flavorful. It is made from gluten, but don't be put off. Unless you have a gluten-allergy, it is not something you have to avoid. It's high in plant-based protein, low in calories, and delicious. It is easily made using vital wheat gluten, which is increasingly becoming widely available.