Pour drained San Marzano tomatoes into a bowl along with olive oil, garlic, and balsamic. Tear basil leaves into pieces, adding to bowl, and using your hands, crush tomatoes into small bite-sized pieces. This can be done a few days ahead of time, if needed as tomatoes will marinate for extra flavor. You’ll likely have a bit of sauce leftover, but it will store in an airtight container for up to a week. In a small bowl, mix together grated mozzarella, Romano, and Parmesan for pizza assembly, set aside.