Preheat oven to 350°F. Combine potatoes, 1 stick butter, onions, ... butter. Sprinkle over potato mixture. Bake at 350°F for ... with parsley, if desired.
Melt butter (save 1/2 for crushed cornflakes). Mix hash browns, 1/2 cup melted butter; ... butter. Sprinkle over potatoes. Bake at 350 degrees ... in oven from freezer.