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1 pound dry ziti pasta1 onion, chopped1 pound lean ground beef2 (26 ounce) jars spaghetti sauce6 ounces provolone cheese, sliced1 1/2 cups sour cream6 ounces mozzarella cheese, shredded
2 tablespoons grated Parmesan cheese
1.Bring a large pot of lightly salted water to a boil. Add ziti pasta, and cook until al dente, about 8 minutes; drain.
2.In a large skillet, brown onion and ground beef over medium heat. Add spaghetti sauce, and simmer 15 minutes.
3.Preheat the oven to 350 degrees F (175 degrees C). Butter a 9x13 inch baking dish. Layer as follows: 1/2 of the ziti, Provolone cheese, sour cream, 1/2 sauce mixture, remaining ziti, mozzarella cheese and remaining sauce mixture. Top with grated Parmesan cheese.
4.Bake for 30 minutes in the preheated oven, or until cheeses are melted.