A very yummy recipe.
Preheat oven to 350 degrees
Combine chicken, sour cream, soup, chilies, onion, and 3 cups of the cheese in a large bowl and mix well
Salt and pepper the mixture to taste
Grease all sides of an 8x8 paking pan
Put a layer of tortillas in the bottom of the pan
Spread on a layer of the chicken mixture about 1/2 inch thick
Sprinkle on a thin layer of cheese
Repeat until pan is full ending with a good covering layer of cheese
Cover pan with aluminum foil and bake for 35 minutes
Uncover and bake for 10 more minutes or until cheese starts to brown a little
Let stand for 10 minutes and then serve