1 Peel the cucumbers and slice them in half lengthwise. Scoop out the seeds. Cut the cucumbers into chunks and place them in a food processor. Process until the cucumbers are finely minced.2 Peel the avocado and add the flesh to the processor. Process until the mixture is smooth.3 Add the yogurt, tomato juice, lime juice and cumin and process until well blended. Refrigerate for at least one hour. Season to taste with salt and pepper. Thin the soup to the desired consistency with ice water. Spoon the soup into individual serving bowls and garnish each with a lime slice.