01 - Preheat your oven to 375°F. Lightly grease a 9x13-inch baking dish with cooking spray or oil.
02 - In a large bowl, combine the uncooked rice, diced onion, red bell pepper, corn, black beans, diced tomatoes with chilies including juices, chicken broth, cumin, smoked paprika, chili powder, garlic powder, salt, and pepper. Mix thoroughly until all ingredients are evenly distributed.
03 - Pour the rice and vegetable mixture evenly into the prepared baking dish, spreading it out into a uniform layer.
04 - Nestle the chicken pieces into the rice mixture, pressing them down slightly so they are partially submerged. Space the chicken evenly throughout the dish.
05 - Cover the dish tightly with aluminum foil. Bake for 35 minutes, or until the rice has absorbed most of the liquid and the chicken is cooked through.
06 - Remove the foil and sprinkle the shredded Mexican cheese blend evenly over the top. Bake uncovered for an additional 10–15 minutes, until the cheese is melted and bubbly and the rice is tender.
07 - Let the casserole rest for 5 minutes before serving to allow the flavors to meld. Garnish with fresh cilantro, sliced jalapeños, sour cream, and lime wedges if desired.