Hash Brown Quiche

I made this today for a brunch at my house and had many requests for the recipe.  Today I substituted the Swiss cheese for a handful of fresh Parmesan and mozzarella.  Essentially you can use any two cups of cheese though it is nice to have one that is stronger like Swiss or Parmesan.  I did less butter and used milk.  

8 shredded hash brown potato patties (found in the freezer section)
1/2 cup butter or less
1 cup cubed precooked ham or cooked sausage
1 cup shredded cheddar cheese
1 cup shredded Swiss cheese
8 eggs
2 cups milk or cream
1/2 t. salt

Optional add ins: salsa, green chilies, green onion, chopped mushrooms etc
Place hash brown patties in greased 9x13 pan. Pour melted butter evenly over the surface of potato patties. Bake at 350 for 20 min. Remove from oven. Sprinkle potatoes with ham and cheeses. In a large bowl beat eggs. Add milk or cream and salt. Pour mixture over cheeses and ham. Bake at 350 for about 30 min, until eggs are cooked solid. serve 8.