1 can condensed cream of mushroom soup
1 soup can milk
3/4 c. uncooked reg. rice
1 (4 oz.) can mushroom stems and pieces
1 env. dry onion soup mix
2 chicken breasts, split in half

Heat oven to 350 degrees. Blend soup and milk; reserve 1/2 cup of the mixture. Stir together remaining soup mixture, rice, mushrooms (with liquid), and half the onion soup mix. Pour into an ungreased baking dish. Arrange chicken breast on rice mixture. Pour reserved soup mixture over chicken and sprinkle with remaining onion soup mix. Cover; bake 1 hour. Uncover; bake 15 minutes longer.