This colorful salad gets a gold star for versatility-it's ideal with most any entree. Plus, its mild mustard vinaigrette comes together in mere minutes.
For dressing, combine the first six ingredients in a blender; cover and process until smooth. In a salad bowl, combine the greens, tomato and cucumber; add dressing and toss to coat. Yield: 6-8 servings (3/4 cup dressing).