Sauté onion, celery, mushroom, and parsley in a little veggie broth.
Pour sautéed veggies over bread crumbs in a very large mixing bowl. Add all seasonings and toss together.
Pour in enough broth to moisten. You can add extra broth for a moister stuffing)
Pack stuffing lightly into crock pot, and cover. Set on High for 45 minutes; reduce to Low and cook for 3 – 4 hours.
Makes 8 large servings.