Add all of the Avocado Dressing ingredients to a blender and chop then puree until smooth, scraping sides down as needed. Add additional water, a tablespoon at a time, as needed to reach desired consistency. Chill while you prepare your salad ingredients. (You can also prepare dressing the day before serving and store in the refrigerator.)
Add all Southwest Salad ingredients to a large bowl and toss to combine. Toss salad with desired amount of dressing or drizzle dressing over individual servings if not eating all of the salad immediately.