Grease a 9×13 pan with butter. Spread 1 to 1 1/2 C. raw rice on the bottom of pan. Lay chicken on top. Pour 1 can cream of mushroom soup diluted with 1 1/2 C. Milk over the top of the chicken. Sprinkle envelop of dry onion soup mix over the top. Cover pan with foil. Bake 2 hours at 350. Sprinkle with Parsley and Paprika before serving.