Shaped like a plum tomato, this variety of tomato originated in the San Marzano region of Italy. As a cousin to the Roma tomato, the San Marzano is highly praised for its flavor and pulp. The lower acidity contained in this variety makes it a more pleasant tomato for anyone with digestive concerns. Somewhat bittersweet but rich in flavor, it has a thin skin with very few seeds contained within the pulp. The San Marzano tomato, when grown in Italy or with seeds from this heirloom variety, provides a tomato that is commonly judged as the "best" or easily "one of the best" for making tomato sauces.