Step 1

Preheat the Oven - Set the oven rack to the middle position. Heat at 350ºF (177ºC).

Step 2

Defrost the Potatoes - Thaw the potatoes before using, either in the microwave or at room temperature for 30 minutes. Drain off any excess moisture.

Step 3

Mix the Ingredients - In a large bowl, combine defrosted potatoes, 1 cup cheddar cheese, cream of chicken soup, sour cream, onion, melted butter, minced garlic, salt, and pepper.

Step 4

Load the Casserole Dish - Lightly grease a 13x9 baking dish. Spread the mixture inside. Evenly sprinkle with 1 cup of cheddar cheese on top.

Step 5

Bake - Bake until hot and bubbly and the cheese is lightly browned, about 45 to 55 minutes.

Step 6

To Serve - Garnish with chopped parsley if using. Serve while still hot.