Bring a large pot of salted water to a boil. Cook ziti until just al dente. Drain and set aside.

In a large skillet over medium heat, brown the ground meat until fully cooked. Add onion and cook until softened. Stir in garlic and cook briefly until fragrant.

Add marinara sauce, Italian seasoning, salt, and pepper. Simmer for 5–7 minutes.

In a mixing bowl, combine cream cheese, ricotta, sour cream, mozzarella, and Parmesan until smooth and creamy.

Preheat oven to 375°F (190°C).

Spread a thin layer of meat sauce in a greased 9×13-inch baking dish. Add half of the pasta, followed by half of the meat sauce and half of the cheese mixture. Repeat layers.

Sprinkle remaining mozzarella evenly over the top. Cover with foil and bake for 25 minutes.

Remove foil and bake an additional 10–15 minutes, until bubbly and lightly golden.

Let rest for 10 minutes before serving. Garnish with fresh herbs if desired.