1lbdry ziti pastaor pasta of your choice that will hold sauce; I used rigatoni this time
1lbground pork or bulk sausageI find it to be even better with bulk sausage
226-oz jars pasta sauce, your choice of variety
8slicesmozzarella cheeseor 12 oz fresh mozzarella, sliced thinly
Preheat oven to 350 degrees Fahrenheit. Grease a 9x13 baking dish and set aside.
Set a large pot of salted water to boil. While waiting, brown the ground pork or bulk sausage with the chopped onion. Drain fat and set aside.
Cook pasta according to box directions. Drain and return to pot. Mix in the browned pork/sausage, onion, and jars of pasta sauce.
Spread half the pasta mix in the bottom of the prepared 9x13 pan. Spread the sour cream over that and top with the slices of provolone cheese. Cover with the rest of the pasta mix. Distribute the slices of mozzarella over the top evenly.
Cover with aluminum foil and bake for 30 minutes. Remove the foil and return to the oven, under the broiler, until the cheese is browned. Let it sit for 5 minutes before serving.
You can also prepare this in 2 separate 8x8 baking dishes, freezing one of them after it's been baked for a future meal.