I learned this fabulous noodle dish from Ms. Nongkran Daks, cooking teacher, author of Thai Noodles and Snacks, and chef-owner of the acclaimed Thai Basil Restaurant, near Dulles Airport in Chantilly, Virginia. In this unusual southern-Thai specialty, coconut milk mellows the sweet-tart edge of tamarind, and the deep rich flavor and color of dark soy sauce play off the vivid green of Chinese broccoli. You coul