This cheesy hashbrown casserole, filled with 3 different cheeses, is a Midwest classic at its best. Top it with your choice of more cheese, crushed potato chips, or corn flakes. Perfect for potlucks and backyard BBQs!
To make ahead: freeze completed casserole before adding topping. To bake from frozen, let the casserole thaw in the refrigerator overnight. Add the topping before baking, and bake at 350 for an hour and 15 minutes or until heated through.