Preheat your oven to 350°F. Lightly coat a 9×13 baking dish with cooking spray. This prevents sticking and helps with easy serving.
Spread the uncooked rice evenly across the bottom of the dish. Sprinkle salt and pepper over the rice. This ensures flavor is evenly distributed.
Lay the chicken breasts on top of the rice. Spoon the cream of chicken soup evenly over the chicken. Pour water around the edges, then sprinkle the dry onion soup mix over everything.
Cover with foil if desired and bake for about 1 hour. Check that the rice is tender and the chicken reaches 165°F internally. Continue baking if needed.
Remove from the oven and sprinkle the remaining cheese on top. Let it melt for a few minutes before serving for a creamy finish.