Vinaigrette
In Western cooking, vinaigrette is the closest thing to an all-purpose sauce. I recommend making vinaigrette in a blender, where it becomes so stable that it can be prepared hours before it is needed. Once made, it can be used on everything from green salad to cold meat, vegetables, or fish dishes to anything that has been broiled or grilled, whether served hot or at room temperature. I well remember the first time I had good vinaigrette, and it was in France. It was so far and away the best salad dressing I’d ever tasted (and at this point I was twenty-six years old, so I’d tasted at least a few, though the vast majority had come out of bottles) that I had to ask the secret. The answer—now so obvious, then a revelation—was shallots. But you can use such a wide variety of flavors in vinaigrette (see the variations) that these days the standard French variety seems almost clichéd.