01 -
Preheat your oven to 375°F (190°C) and lightly grease a 9×13-inch baking dish.
02 -
Heat the olive oil in a large skillet over medium heat. Add the chopped onion with a pinch of salt and cook for 2–3 minutes, until softened. Stir in the garlic, chili seasoning, and cumin. Cook for about 1 minute until fragrant. Add the shredded chicken and stir everything together until evenly coated. Remove from heat.
03 -
In a large bowl, stir together the salsa verde and sour cream until smooth and creamy.
04 -
Spread about ¾ cup of the salsa verde mixture across the bottom of the prepared dish. Cut the tortillas in half and layer 8 tortilla halves over the sauce. Add half of the chicken mixture, about 1 cup of the salsa verde sauce, and ½ cup shredded cheese.
05 -
Add another layer of tortilla halves, then the remaining chicken, another 1 cup of sauce, and another ½ cup of cheese. Finish with a final layer of tortilla halves, the remaining sauce, and the rest of the cheese on top.
06 -
Bake uncovered for 15–20 minutes, until the cheese is fully melted and the casserole is bubbling around the edges. Let it rest for 10–15 minutes before slicing. Top with cilantro, cotija, jalapeños, or red onion if desired.