San Marzano is a variety of plum tomato that originates from the San Marzano region of Italy. Known for its sweet flavor and low acidity, it is often considered one of the best tomatoes for making sauces. The tomatoes are typically elongated and have fewer seeds compared to other varieties, making them ideal for cooking. These tomatoes are grown in the volcanic soil of the Campania region, which contributes to their unique taste. San Marzano tomatoes are often used in traditional Italian dishes and are a key ingredient in authentic Neapolitan pizza sauce. They are available canned or fresh, with canned versions being popular worldwide.