Sprinkle chicken with Cajun seasoning. In a large nonstick skillet coated with cooking spray, brown chicken on both sides.
In a small bowl, combine the soup, water, chilies and lemon juice. Stir into skillet. Bring to a boil. Reduce heat; cover and simmer for 8-10 minutes or until chicken juices run clear. Remove from the heat; stir in sour cream. Serve with rice.