A classic dressing that everyone should know! The "formula" is 1 part vinegar to 3 parts oil. Some people who like sharper dressing will use less oil. The better the quality of the vinegar and oil, the better the dressing!
A classic salad for Balsamic Vinegar Dressing is rocket (arugula) or other leafy greens with shavings of parmesan. That's the sort of salad you will often find on the menu of posh restaurants.