Place all dressing/marinade ingredients in a blender and blend until combined (ginger and parsley should be completely blended in). Set aside.
Cut seitan into smaller pieces, either chunks or strips. Place them into a small container and pour the dressing/marinade over top. Place a tight lid on top and allow to marinate for 30 minutes, turning every so often to make sure all of the seitan gets coated in the dressing.
While the seitan is marinating, prepare the veggies. Set aside.
When the seitan has marinated for a half hour, carefully remove seitan and grill strips a few at a time in a large pan. I like using my cast iron pan. Be careful to save all of the marinade—this becomes your salad dressing! Once all of the seitan has been cooked, assemble salads and serve with the dressing on the side. If making mushrooms, reserve a few tablespoons of the dressing. Enjoy!