Preheat oven to 350 degrees. Spray 9x13 pan with cooking spray. Layer rice, 1 cup shredded cheese, salt, and pepper in pan.Place chicken breasts on top. Daub rounded teaspoons of cream of chicken soup over the chicken breasts and rice.
Pour water on top and sprinkle with onion soup mix.
Bake uncovered for 1 hour.
Remove from oven, and stir excess sauce into the rice. Sprinkle with remaining ½ cup cheese.
