Preheat the oven to 350 degrees Fahrenheit. Lightly spray a 9×13 inch baking dish with nonstick cooking spray.
In a large bowl, stir together the chicken, uncooked rice, cream of chicken, sour cream, diced onion, chicken broth, diced bell pepper, fajita seasoning, and half of the cheese.
Pour the mixture into the prepared dish and spread it out evenly. Wrap tightly in aluminum foil.
Bake in preheated oven at 350 degrees Fahrenheit for 35 to 40 minutes or until it is bubbling.
Remove from the oven, top with the remaining cheese and return to the oven, uncovered, until the cheese is melted, about 5 minutes.
Let rest for 5 minutes before serving.
