1 tablespoon extra-virgin olive oil
2 cups sliced mushrooms, (about 4 ounces)
3/4 cup chopped celery
3/4 cup chopped carrots
1/4 cup chopped shallots
1/4 cup all-purpose flour
1/4 teaspoon salt
1/4 teaspoon freshly ground pepper
4 cups reduced-sodium chicken broth
1 cup quick-cooking or instant wild rice, (see Ingredient Note)
3 cups shredded cooked chicken, or turkey (12 ounces; see Tip)
1/2 cup reduced-fat sour cream
2 tablespoons chopped fresh parsley