Combine the mayonnaise, sour cream, lemon juice, Worcestershire sauce, mustard, basil, parsley, chives, tarragon and garlic, processing until smooth and scraping down the sides as necessary. Season with salt and pepper.
Serve with crudite and green salad.
The dressing will thicken as it chills. This is a great way to use up extra fresh herbs, switch out whatever herbs you have on hand.