Mix together sour cream, cream cheese, eggs, cream of chicken soup, chopped onion, olives (optional), green chillies, chicken, tuna or turkey (add more than called for if desired).
Spread mixture evenly in a 9x13 pan glass or earthenware casserole dish.
Top with shredded cheese.
Cover and bake 1 hour 350 degrees. Can be frozen and cooked later or cooked and reheated.
A metal 9x13 pan takes longer to cook than a glass one, so bake it slightly longer if you use a metal pan.
Mixture should be set well when removed from oven.
