Chilled Avocado Soup

Name: Chilled Avocado Soup
Ingredients: 2 small avocados; 12 ounces soft regular or silken tofu, drained and cubed; 1/4 sweet onion, chopped; 2 tablespoons freshly squeezed lemon juice; 1 small clove garlic, chopped; 1 heaping teaspoon brown sugar or sucanat; 1/2 teaspoon chopped fresh cilantro; ¼ teaspoon sea salt, plus more as needed; ⅛ teaspoon cayenne pepper; 2 tablespoons filtered or spring water, plus more as needed; Freshly ground pepper, to taste; Cilantro sprigs or chopped fresh flat-leaf parsley, for garnish