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, 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 to distribute spices evenly.
03 - Pour the rice and vegetable mixture evenly into the prepared baking dish, spreading it into an even layer.
04 - Nestle the chicken pieces into the rice mixture, pressing them down slightly so they are partially submerged. Space them evenly across 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. Return to the oven and bake uncovered for 10–15 minutes, until the cheese is melted and bubbly and the rice is tender.
07 - Let the dish rest for 5 minutes before serving to allow the flavors to meld. Serve hot, garnished with fresh cilantro, sliced jalapeños, sour cream, and lime wedges if desired.