Instructions

  1. Sauté onion in oil until it's tender.
  2. Add tomato paste, tomato sauce, water, oregano, basil, salt and pepper.
  3. Simmer, covered, for 10 minutes.
  4. Preheat oven to 375ºF.
  5. Coat casserole dish with cooking spray.
  6. Combine ricotta and 1/2 of the mozzarella in a large bowl.
  7. Add cooked ziti and half of the sauce.
  8. Stir.
  9. Turn into prepared casserole dish and pour on the remaining sauce.
  10. Sprinkle with the remaining cheese.
  11. Bake for 25 to 30 minutes.