Created on November 3rd, 2014
Bring a large pot of water to a boil. Add ziti pasta, and cook about 8 minutes. Drain.
In a large skillet, brown onion and ground beef over medium heat. Add spaghetti sauce, and simmer 15 minutes.
Preheat oven to 350 degrees. Grease a 9x13 baking dish.
Layer as follows: 1/2 of the ziti pasta, provolone cheese, sour cream, 1/2 the sauce mixture, remaining ziti pasta, mozzarella cheese, and remaining sauce mixture.
Bake for 30 minutes or until cheeses are melted.
Remove from oven and top with grated Parmesan cheese.
Serve with hot bread and enjoy!