Pistachio Gelato at Coletta Gelato When I learned that the owners of Coletta had attended gelato school in Bologna, Italy, my first thought was: gelato school? And my second: career change? Unlike other spots in town, Coletta makes it’s gelato base in-house using organic milk from Clover, then blends it into sweet, creamy velvet. If it’s available, get the pistachio, made with California-grown nuts. Coletta Gelato: 685 Harrison St. colettagelato.com.