THAW potatoes in the refrigerator overnight, or on the counter for 1 hour.
Preheat oven to 375 degrees Fahrenheit.
In a large bowl combine the cream of chicken soup, sour cream, cheese, garlic salt, pepper, onion flakes, chives, and green onion. Stir thoroughly. Fold in the thawed O'Brien potatoes.
Grease a 9x13-inch baking pan with cooking spray. Spread the potato mixture inside. Cover baking dish with foil and bake for 45 minutes or until bubbly.
Remove foil and sprinkle with crushed potato chips. Pour melted butter over the top of the crushed chips. Return to oven and bake uncovered for an additional 10 minutes. Broil for 1-2 minutes more for a darker topping. Allow potatoes to cool for 10 minutes before serving.