When it comes time to whip up a vinaigrette for your favorite salad, Julia Child's recipe for her dressing gets high marks. All you need is oil, vinegar, and some seasoning.
Child uses a ratio of one part vinegar and lemon juice to between six and eight parts oil. By going heavier on oil than acid, the dressing will be very mellow-tasting.
This ratio allows you to explore your culinary creativity, so you can customize this dressing with additional lemon juice and vinegar, or add herbs and seasonings.