Preheat the oven to 375°F (190°C). Cook the ziti pasta according to package instructions until al dente. Drain and set aside.

In a large pot, brown the ground beef and onion over medium heat until the meat is cooked through. Add garlic and cook for an additional minute.

Stir in crushed tomatoes, Italian seasoning, salt, and pepper. Simmer for 15 minutes.

In a large mixing bowl, combine the cooked pasta, meat sauce, ricotta cheese, half of the mozzarella, Parmesan cheese, egg, and parsley. Mix well.

Transfer the mixture to a greased 9x13 inch baking dish. Top with remaining mozzarella cheese.

Cover with foil and bake for 30 minutes. Remove foil and bake for an additional 15 minutes until cheese is bubbly and golden.

Let the baked ziti cool for a few minutes before serving. Enjoy!