Got this recipe from my husband's aunt. It is absolutely delicious and everyone I have ever made it for thinks it is also! It goes great with Salsa of your choice on top when you serve it as a garnish if so desired.
Cook chicken if using chicken breasts & shred. In Lg bowl mix chicken, green onion, sour cream, cream cheese, cream of chicken soup, green chiles and 1 cup of shredded cheese all together.
Spray bottom of 13x9 pan with cooking spray, Layer first mixture then on top of that use 6 corn tortillas, then chicken mixture, then other 6 corn tortillas, ending with rest of chicken mixture. Sprinkle rest of cheese on top.
Put a layer of foil on top of the pan loosely. Bake in oven at 375 for 45 mins.