In a compact San Francisco storefront, the kitchen’s only source of heat is its most prized possession: a massive, white-domed oven, built by a century-old Neapolitan manufacturer and reassembled on-site. Burning a mix of oak and almond wood at nearly 900 degrees, it dictates the rhythm of Sforno Pizzeria Napoletana. Pizzas are cooked in as little as sixty seconds, a rapid turnaround that complements the bright, bustling energy of the room. This singular focus on the traditions of Naples guides every element of the operation, creating a direct link between the city and the craft. The dedication to authenticity extends to the pantry, which balances premium Italian imports with produce from nearby Napa farms. The dough, the foundation of any great Neapolitan pie, is soft and chewy, made from highly hydrated, imported double-zero flour. It becomes the base for carefully sourced toppings like Agerola mozzarella and fragrant Calabrian oregano. The restaurant is also known for specialty pizzas that have become local favorites, including one featuring mortadella and creamy burrata, and for its *panozzi*, sandwiches made from double-baked pizza dough. While whole pies are the main event, the spirit of the place is perhaps best captured by the *pizza a portafoglio*. This quintessential Neapolitan street food, a Margherita folded over on itself like a wallet and served in paper, is designed to be eaten on the move. It’s an offering that perfectly suits the restaurant’s setting in the Hayes Valley neighborhood. With an open kitchen that lets you watch the dough being stretched and fired, the whole process is fast and unfussy. Seating is limited, with just a few tables inside and on the sidewalk, reinforcing the takeaway nature of the pizzeria. Many patrons carry their orders to a nearby park, enjoying the well-crafted pizza in a casual, urban setting. The entire operation centers on a direct, honest expression of Neapolitan tradition.