The addition of cucumber to the traditional recipe results in a dressing with a decidedly lighter, fresher flavor.

Ingredients

　　Stir together 1 medium cucumber, peeled, halved lengthwise and seeded, then grated on the large holes of a box grater, 1 tablespoon finely chopped shallot, 3/4 cup sour cream, 1/4 cup each buttermilk and mayonnaise, 3 1/2 tablespoons fresh lemon juice (about 1 lemon), 1 1/4 teaspoons coarse salt (or to taste), 3 tablespoons each finely chopped fresh flat-leaf parsley and fresh chives, and a pinch of cayenne pepper in a medium bowl. Season with more salt and cayenne, if desired.

　　Reprinted with permission from Martha Stewart's Cooking School: Lessons and Recipes for the Home Cook by Martha Stewart. Copyright © 2008 by Martha Stewart. Published by Crown Publishing. All Rights Reserved.Martha Stewart is the author of dozens of bestselling books on cooking, entertaining, gardening, weddings, and decorating. She is the host of The Martha Stewart Show, the Emmy-winning, daily national syndicated program, and founder of Martha Stewart Living Omnimedia, which publishes several magazines, including Martha Stewart Living; produces Martha Stewart Living Radio, channel 112 on SIRIUS Satellite Radio; and provides a wealth of ideas and information on www.marthastewart.com.