Heat the oven to 375°F. Warm oil in a large saucepan and cook garlic over medium-low heat for 1 minute until fragrant. Add crushed tomatoes, tomato sauce, oregano, sauce salt and pepper and simmer gently for 15 minutes.
Meanwhile, boil ziti in water with the tablespoon salt until 3 minutes short of the package time. Drain without rinsing and fold into the tomato sauce.
Spread half the sauced pasta in a deep 9-by-13-inch baking dish. Dot with half the ricotta and scatter with 3 oz mozzarella, then repeat with remaining pasta, ricotta and another 3 oz mozzarella.
Scatter remaining 4 oz mozzarella and Parmesan over the top. Cover with foil and bake for 25 minutes.
Uncover and bake for 10 to 12 minutes until bubbling, the center reaches 165°F and the top has brown patches. Rest for 10 minutes before serving.