Tourists to the Napa Valley may visit their favorite exclusive wineries and fine dining restaurants. But locals love a more humble dish called malfatti. It’s a little spinach and cheese dumpling, shaped like a pinky finger and smothered in sauce. The most famous malfatti in the region is found in the back of Val’s Liquor in the city of Napa. The story of how that came to pass involves Napa’s deep Italian history, the 1906 San Francisco earthquake, and a fortuitous mistake.