Green Goddess Salad

Name: Green Goddess Salad
Prep time: 15 min
Total time: 15 min
Cuisine: American
Ingredients: 0.5 avocado, peeled and pitted; 0.75 cup nonfat buttermilk; 2 tablespoons chopped fresh herbs, such as tarragon, sorrel and/or chives; 2 teaspoons tarragon vinegar, or white-wine vinegar; 1 teaspoon anchovy paste, or minced anchovy fillet; 8 cups bite-size pieces green leaf lettuce; 12 ounces peeled and deveined cooked shrimp, (21-25 per pound; see Ingredient note); 0.5 cucumber, sliced; 1 cup cherry or grape tomatoes; 1 cup canned chickpeas, rinsed; 1 cup rinsed and chopped canned artichoke hearts; 0.5 cup chopped celery