Image credit to: Boston Organics
1. In blender, combine half cucumber and one avocado with yogurt, lime juice, jalapeno, scallions, 1 tablespoon cilantro, 1 cup ice water, 1 1/2 teaspoons salt, and 1/4 teaspoon pepper. Puree until completely smooth. Transfer to large bowl.
2. Cut remaining avocado into 1/4-inch cubes. Stir avocado and remaining cucumber into soup. Thin with 1/2 to 1 cup ice water, as desired. Season again with salt and pepper. Chill, about 1 hour.