Per Serving:50 calories, 5 g protein, 3 g carbohydrates (2 g sugars)
Combine the yogurt, buttermilk, avocado, basil, cilantro, Worcestershire sauce, dill, mustard, garlic powder, onion powder, black pepper, and salt (if desired) in a food processor or blender. Process or blend until smooth. Store in the refrigerator. The dressing keeps about 3 days.
Note: To make the dressing, add a little extra buttermilk to thin the mixture.