Ginger Vinaigrette

This easy sauce — a ten-minute dazzler — turns any kind of fish (seared, grilled, roasted, poached) into a special event. 

Makes enough to sauce two servings.  For more, just double, triple or quadruple the ingredients. You can make it ahead up; if you prepare it more than a few minutes in advance, don't add the cilantro till just before you serve it.