Preheat oven to 400°F. In a large bowl, stir together hashbrowns, melted butter, eggs, 1 cup cheese, ham and salt. Press mixture into a greased 18x13-inch rimmed baking sheet.
Bake 30 minutes or until hashbrowns are browned and crisp. Sprinkle with remaining 1 cup cheese; bake 10 minutes longer.