Runza Casserole

A comforting bake that pays homage to the treasured Nebraskan sandwich.
Ingredients
2 pkgs refrigerated crescent rolls (do not separate rolls)
2 lbs ground beef
2 tablespoons butter
4 cups green cabbage, shredded
1 large yellow onion, finely chopped
1 1/2 cups Mozzarella cheese, grated
Kosher salt and freshly ground pepper, to taste
Preparation