Use high-quality canned whole peeled tomatoes for the best sauce flavor. Adjust the amount of red pepper flakes based on your preferred spice level. Simmer the sauce slowly to develop deep, rich flavors. Reserve some pasta water to help loosen the sauce and make it cling better to the pasta. Fresh basil added at the end keeps its bright flavor and aroma. Grate your own Parmesan or Pecorino Romano cheese for maximum freshness and flavor.