This was originally posted by my cyber-friend Moxie; I was lucky enough to rescue it during a recent recipe 'adoption' drive. Her original intro read: "Sumac has a tangy, citrusy flavor and is very nice with the salmon & balsamic vinegar in this recipe. A little bird told me about the virtues of sumac (ok, it was Chef Canary Girl!), and now I'm a big fan. This recipe came from a website called Global Gourmet. Prep time includes marinating time, and cooking time will depend on the thickness of your salmon, heat of your grill, etc."