01 -
Preheat oven to 375°F (190°C). In a large bowl, combine shredded chicken, chicken gravy, instant rice, cream of chicken soup, sour cream, mushroom pieces, onion, celery, water, green olives, ripe olives, parsley, and pepper.
02 -
Transfer the mixture to a greased 13x9-inch (33x23 cm) baking dish. Cover with aluminum foil and bake for 30 minutes.
03 -
Uncover the dish, stir the mixture, and bake uncovered for an additional 20-25 minutes, or until the casserole is bubbly and the rice and vegetables are tender.
04 -
If desired, top the casserole with chopped green onions before serving.