Preheat your oven to 375°F (190°C).

Cook the ziti pasta according to the package instructions until al dente.

In a large skillet, cook the sausage over medium heat until browned and cooked through. Add the onion and garlic and cook until softened.

Add the crushed tomatoes, tomato paste, basil, oregano, salt, and pepper to the skillet. Bring to a simmer and let cook for 10 minutes.

In a large bowl, mix together the ricotta cheese and 1 cup of the shredded mozzarella cheese.

Add the cooked ziti pasta to the bowl with the ricotta cheese mixture and stir to combine.

Spread half of the sausage and tomato sauce in the bottom of a 9×13 inch baking dish. Spoon the ziti mixture over the sauce and spread evenly. Top with the remaining sauce.

Sprinkle the remaining shredded mozzarella cheese and grated Parmesan cheese over the top of the ziti.

Bake in the preheated oven for 25-30 minutes, or until the cheese is melted and bubbly and the ziti is heated through.

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