Set the oven to 350 °F.
Chicken that has been sliced is salt and pepper-seasoned.
Olive oil should be heated in a large skillet over medium heat. Once the poultry is added, cook it until it is evenly browned.
Stir together the cream of chicken soup, chicken stock, cumin, and chili powder in the skillet after adding the onion, bell pepper, diced tomatoes, and green chiles. The mixture should be brought to a boil before being simmered for ten minutes on medium heat.
A 9 x 13-inch baking dish should have the bottom covered with half of the poultry mixture. Repeat with the leftover chicken mixture and tortillas after placing four of the tortillas on top.
On top of the dish, grate some cheddar cheese.
Bake for 20 minutes with the foil covering the baking tray. Once the casserole is hot and bubbling, remove the paper and bake it for an additional 10 minutes, or until the cheese has melted.
The casserole should be served hot with any favored side foods.