Rinse chicken; pat dry with paper towels. In a medium saucepan combine thawed concentrate, celery, onion, bouillon granules, thyme, 2 cups water, and dash pepper. Bring to boiling. Transfer to a 3-quart rectangular baking dish. Stir in uncooked rice. Add chicken pieces. Sprinkle lightly with garlic salt, paprika, and additional pepper.
Cover and bake in a 350 degree oven for about 1 hour or until chicken is tender and no longer pink and rice is tender. Sprinkle with snipped parsley before serving.