01 -
Lightly grease a 9x13-inch ovenproof dish with nonstick cooking spray.
02 -
In a large mixing bowl, thoroughly combine shredded chicken, uncooked instant rice, cream of chicken soup, sour cream, frozen diced onion and bell pepper blend, undrained diced tomatoes with chilies, chicken broth, fajita seasoning, and half of the shredded cheese blend until evenly incorporated.
03 -
Spread the mixture evenly into the prepared baking dish, smoothing the surface with a spatula.
04 -
Cover the dish with aluminum foil and bake at 175°C (350°F) for 35 minutes.
05 -
Remove foil, sprinkle remaining cheese evenly over the top, and bake uncovered for an additional 10 minutes until cheese melts and bubbles.
06 -
Let the casserole rest for 5 minutes before serving to improve slicing and texture.