Baked Ziti

1/2 pound dry ziti pasta
1/2 onion, chopped
1/2 pound lean ground beef
1 (26 ounce) jar spaghetti sauce
3 ounces provolone cheese, sliced
3/4 cup sour cream
3 ounces mozzarella cheese, shredded
1 tablespoon grated Parmesan cheese


Bring a large pot of lightly salted water to a boil. Add ziti pasta, and cook until al dente, about 8 minutes; drain.
In a large skillet, brown onion and ground beef over medium heat. Add spaghetti sauce, and simmer 15 minutes.
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.
Bake for 30 minutes in the preheated oven, or until cheeses are melted

-->My daughter is 17mon old as this is her new favorite meal!! ate 3 plates full tonight!!!! this is so easy!!! I didnt have Provolone cheese or mozzarella cheese in the house So I used the 4 cheese mexican blend in place of both of them... also I used Rotoni pasta instead of ziti... So I guess I made a baked rotoni..