Preheat your oven to 375 degrees Fahrenheit.
In a skillet, heat the oil over medium-high heat and add the tomatoes.
Cook for a few minutes to soften them up.
Meanwhile, cook the rice according to the package instructions and set aside.
This step is crucial to ensure the rice absorbs the delicious flavors in the casserole.
In a large bowl, combine the shredded chicken, beans, cooked rice, salt, and pepper.
Mix well to distribute all the ingredients evenly.
Lay a few tortillas at the bottom of a baking dish.
Layer half of the chicken mixture on top, followed by a sprinkle of cheese.
Repeat the layers, ending with a top layer of tortillas and cheese.
Place the casserole in the oven and bake for about 30 minutes or until the cheese is bubbly and golden.