1 can (10 3/4 oz.) cream of mushroom soup
1 soup can milk
3/4 c. uncooked rice
1 can (4 1/2 oz.) mushroom stems & pieces
1 env. onion soup mix
2 chicken breasts, split

Heat oven to 350 degrees. Blend soup and milk. Reserve 1/2 cup mixture. Stir together remaining soup mixture, rice, mushrooms, (with liquid) and 1/2 onion soup mix. Pour into ungreased baking dish. Arrange chicken breasts over rice mixture. Pour reserved soup mixture over chicken breasts and sprinkle remaining onion soup mix over it. Cover. Bake 1 hour. Uncover. Bake 15 minutes longer.