The San Marzano tomato is a variety of plum tomato that originates from the San Marzano region near Naples, Italy. Known for its sweet flavor and low acidity, it is often considered one of the best tomatoes for making sauces. The fruit is elongated, with a thick flesh and fewer seeds, making it ideal for cooking. These tomatoes are typically grown in volcanic soil, which contributes to their unique taste. San Marzano tomatoes are often used in traditional Italian dishes and are a key ingredient in many recipes, including pizza and pasta sauces. Their popularity has led to a demand for authentic varieties, often labeled as "DOP" (Denominazione di Origine Protetta) to ensure quality.