Carol's Baked Ziti Casserole

Preheat oven to 375 degrees F (190 degrees C).

Lightly grease a 9x13-inch baking dish.

Fill a large pot with lightly salted water and bring to a boil.

Stir in ziti pasta and return to a boil.

Cook pasta, stirring occasionally, until cooked through but still firm to the bite, about 11 minutes; drain.

Combine egg, ricotta cheese, and 1/4 cup Parmesan cheese in a bowl.

Spread 1/3 the spaghetti sauce in prepared baking dish.

Top with 1/2 the pasta, 1/2 the ricotta mixture, 1/3 the spaghetti sauce, 1/2 the mozzarella cheese, and 1/2 the Parmesan cheese; repeat layers.

Top with remaining spaghetti sauce and Parmesan cheese; cover baking dish with aluminum foil.

Bake in preheated oven until heated through, 45 to 50 minutes.