When a winery adds a new wine to its portfolio, I’m always curious how that happens. What’s the thought process? Is it to meet a real or perceived customer demand? Is it because there is some extra fruit that isn’t accounted for? So I asked Lieb Cellars general manager Ami Opisso how Lieb Cellars 2013 Reserve Sparkling Rose ($35) made its way into the winery’s portfolio. She told me “The simple answer is that we’ve been making what we like to drink.” It’s hard to argue with that thought process. Each summer, the Lieb management team gets together — before…