Stir the stock, parsley, olives, lemon juice, black pepper, tomatoes and rice in a 13 x 9 x 2-inch baking dish. Cover the dish.
Bake at 375 degrees F for 20 minutes.
Place the chicken onto the rice mixture. Sprinkle the chicken with the garlic powder and paprika. Cover the dish.
Bake for 30 minutes or until the chicken is cooked through and the rice is tender.