1 1/2 cups shredded mozzarella cheese
1 pkg (10-oz) refrigerated pizza dough
1 tbsp grated Parmesan cheese
Preheat oven to 425 degrees.
Cook beef in a large ovenproof cast-iron skillet over medium-high heat, stirring frequently to break up, until browned and crumbly. Drain well then return to skillet.
Add the marinara sauce to the beef and mix well. Sprinkle the mozzarella cheese over the top.
Unroll the pizza dough and spread out over the beef and mozzarella in the skillet. Trim dough to fit just inside the skillet. Discard the excess dough.
Sprinkle the Parmesan cheese over the top of the dough.
Place skillet in oven and bake at 425 degrees until the crust is browned, approximately 15 minutes.
Remove from oven and let stand for 5 minutes before cutting into wedges to serve.
Note: Rather than discard the excess pizza dough, I like to brush it with garlic butter and bake along side the casserole for garlic bread sticks.