A San Marzano tomato is a plum tomato grown in the volcanic soil near Naples, Italy. It has thin skin, few seeds, and a sweet, low-acid taste. Cooks around the world prize the San Marzano for its balance of sweetness and depth. Unlike many supermarket tomatoes, a true San Marzano holds its shape well during long cooking. That makes it a favorite for sauces, soups, and slow-braised dishes.
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