If you create a wonderful, fresh salad then I believe that you should have a fantastic dressing to go on it! It takes no time at all and tastes SO much better and is much healthier than the bottled stuff. The herbs can be changed to suit your taste; I like the sweetish combination of the tarragon and basil, but this works well with thyme too. The sour cream can be replaced by plain yogurt or even buttermilk. Prep time is for the combined ingredients getting to know each other better in the fridge!