Today marks the triumphant return of "What We Drank" after a brief late-summer hiatus. As always, here's what our editors and contributors have been drinking. Mark Grimaldi: Ameztoi "Rubentis" Txakolina 2010 Yes, rosé again. But not just any rosé. Txakolina is always, if you can find it, the quintessential summer quaffer. Now make it a rosé and you've damn near found the key to life. A close friend from the city brought this out to our house one weekend this spring. That Monday after, I asked a friend who owns a local wine shop if he would order it for…