Cook the Pasta:

• Bring a large pot of salted water to a boil and cook the ziti 1-2 minutes less than package instructions (it will finish cooking in the oven).
• Drain and toss with 1 tablespoon olive oil to prevent sticking.

Prepare the Sauce:

• In a large pan over medium heat, sauté onion and garlic in olive oil until softened.
• Stir in crushed tomatoes, tomato sauce, oregano, basil, red pepper flakes, salt, black pepper, and sugar.
• Simmer for 10-15 minutes, stirring occasionally.

Make the Cheese Mixture:

• In a bowl, mix ricotta, Parmesan, Italian seasoning, and egg (if using) until well combined.

Assemble the Baked Ziti:

• Preheat oven to 375°F (190°C).
• In a large baking dish, spread a thin layer of sauce on the bottom.
• Add half of the cooked ziti, then half of the ricotta mixture, followed by half of the remaining sauce.
• Repeat the layers, finishing with shredded mozzarella cheese on top.

Bake:

• Cover with foil and bake for 20 minutes.
• Remove foil and bake for another 10-15 minutes until cheese is golden and bubbly.

Serve & Enjoy:

• Let cool for 5 minutes, then garnish with fresh basil or parsley before serving.