Hash Browns Potato Casserole

Name: Hash Browns Potato Casserole
Ingredients: 1 small onion, finely chopped; 2 -3 green onions, chopped; 2 1⁄2 cups finely cubed cheddar cheese (can use more); 1 cup sour cream; 1⁄4 cup mayonnaise; 1 (10 3/4 ounce) can cream of chicken soup, undiluted; 1 (10 3/4 ounce) can cream of mushroom soup, undiluted; 1 teaspoon seasoning salt; 1 teaspoon garlic powder; black pepper (to taste); 1 (2 lb) package frozen hash brown potatoes (thawed, to speed things up just place in microwave); 1⁄2 cup melted butter; 2 1⁄2 cups corn flakes cereal (just slightly crushed)