A delicious and hearty pasta dish.
Undercooking pasta by two minutes on the initial boil prevents structural collapse during the final 30 minutes in a 350 degree F oven. Boiling ziti for only 8 minutes leaves the center rigid enough to absorb simmering tomato sauce rather than turning mushy. Stacking baked dishes requires methodical thermal planning. Sour cream interspersed between provolone and the meat sauce creates a distinct dairy barrier that melts into a rich sauce instead of separating. Buttering a 9x13 inch baking dish ensures easy extraction of portions once the mozzarella turns golden.
Drain the ziti immediately after the 8-minute mark and shock it briefly with cold water if assembly pauses. Brown the lean ground beef and chopped onion over medium heat until no pink remains, then simmer with spaghetti sauce for precisely 15 minutes to reduce excess moisture. Layering half the pasta first, followed by sliced provolone, sour cream, half the sauce, the remaining ziti, shredded mozzarella, and the rest of the sauce, creates balanced pockets of fat and moisture throughout the casserole. Dusting grated Parmesan cheese over the top surface right before baking guarantees a savory crust. Bake uncovered until the internal cheeses bubble vigorously.
Pairing this heavy casserole with an acidic green salad dressed in a sharp vinaigrette cuts through the richness provided by the sour cream and mozzarella.