Kosher salt and freshly ground black pepper, to taste
PREPARATION
Bring a large pot of salted water to a boil. Cook pasta 1-2 minutes less than package directions indicate. Drain and set aside.
Meanwhile, in a large skillet over medium-high heat, season the ground beef with salt and pepper and brown, breaking it apart as it cooks.
When beef is about halfway cooked, add onion and continue cooking until beef is no longer pink. Add garlic and cook 1 minute more.
Season with Italian seasoning, then stir in tomato sauce and crushed tomatoes. Let simmer gently at least 15-20 minutes.
Preheat oven to 350°F and grease a 9x13-inch baking dish with nonstick spray.
Spread a thin layer of sauce in the baking dish, then mix the rest of the sauce with the cooked ziti.
Pour half of the ziti/sauce mixture into the dish, then top with a layer of Provolone slices, dollops of sour cream, the remaining ziti, followed by the mozzarella cheese.
Cover with foil and bake 20 minutes. Remove foil and bake until cheese is bubbly and lightly golden, about 15 minutes more.