1Combine rotisserie chicken, cream of chicken soup, chopped green onions, sour cream, dehydrated minced onion, shredded sharp cheddar, and partially thawed shredded hash browns in a large bowl, then add salt and pepper to taste.
2Mix the ingredients thoroughly until well combined.
3Spray a 9x13 baking dish with cooking spray.
4Pour the mixture into the prepared baking dish and spread it out evenly.
5Combine crushed corn flakes with melted butter.
6Spread the buttery corn flake mixture over the top of the chicken casserole.
7Bake in a 375 degree oven until bubbling and golden brown.