A vinaigrette is a simple dressing made primarily from oil and vinegar. It is commonly used to enhance the flavor of salads and vegetables. The basic ratio is three parts oil to one part vinegar, but this can be adjusted to taste. Additional ingredients like herbs, spices, or mustard can be added for extra flavor. Vinaigrettes can be made with various types of oils, such as olive oil or canola oil, and different vinegars, including balsamic vinegar or red wine vinegar. They are versatile and can be used in marinades or as a drizzle over cooked dishes, making them a staple in many kitchens.