Tangy and a touch sweet, this is a great all-purpose balsamic vinaigrette. The secret is a spoonful of Dijon mustard, which acts as an emulsifier and makes the dressing nice and thick. If possible, use the same brands of olive oil and balsamic vinegar that I use, as different brands will yield an entirely different tasting vinaigrette. Not necessarily bad, just different :) I'm using the best of the supermarket brands, which is Lucini.