Chicken Enchilada Casserole

2 cans cream of chicken soup
1 small container sour cream
1-2 small cans green chilies
3 cups cooked and chopped chicken breasts
1 cup chopped onions (optional)
1 2/4 cup grated cheddar cheese
2 doz. tortilla chips

Mix soup, sour cream, chilies, chicken, 1/2 cup onions, and 3/4 cup cheese thoroughly in large bowl.

Turn into a large shallow baking dish.
Add tortilla chips, broken up by pushing into mixture until covered.

Bake at 350F for 10 mins.

Remove from oven and cover with remaining onions and cup of cheese.

Place extra chips around sides of baking dish.

If desired top with chopped tomato and lettuce.