Heat oven to 350°F. Spray 13x9-inch (3-quart) glass baking dish with cooking spray.
In large microwavable bowl, microwave potatoes on Defrost 12 to 15 minutes or until thawed, stirring once or twice. Stir in remaining ingredients except parsley; spread in baking dish.
Bake 30 to 45 minutes or until browned and bubbly around edges. Sprinkle with chopped parsley.