01 -
Set oven to 175°C (350°F) to reach temperature while assembling ingredients.
02 -
Warm olive oil in a large skillet over medium heat. Add shredded chicken and half of the taco seasoning, stirring well until evenly coated and heated through.
03 -
In a large bowl, mix heated chicken, black beans, corn, diced tomatoes with green chilies, cooked rice, salsa, sour cream, and the remaining taco seasoning. Stir thoroughly to integrate all components.
04 -
Spread half of the chicken mixture into a greased 22 × 33 cm baking dish. Evenly scatter half of the cheddar and Monterey Jack cheese over the mixture.
05 -
Layer the remaining chicken mixture over the cheese. Arrange tortilla chips or sliced flour tortillas on top if desired, then finish with the remaining cheese.
06 -
Cover dish with aluminum foil and bake for 20 minutes. Remove foil and continue baking for 10–15 minutes until the cheese is golden and bubbling.
07 -
Remove from the oven and allow to cool for 5 minutes. If desired, garnish with freshly chopped cilantro.
08 -
Cut the casserole into squares and serve warm. Offer extra salsa or sour cream on the side as preferred.