Preheat the oven to 350° and add melted butter to a 3 quart baking dish.
In a large bowl, add sour cream, soup, diced green chiles, two cups shredded cheese, garlic salt and pepper. Stir to combine.
Add thawed hash browns, and diced ham to mixture, stir to combine, and spoon into prepared baking dish.
Spread in an even layer, and top with the remaining shredded cheese.
Bake for 45-50 minutes or until it's golden and bubbly.
