All you need to make this soup is a blender. Combine the ingredients, blitz, and enjoy!
Puree the scallions, cucumbers, zucchini, oil, basil, and lemon juice in a blender until smooth.
Add the yogurt and 1 teaspoon each salt and pepper and pulse to combine.
Serve topped with additional yogurt, torn basil, and pepper. Drizzle with olive oil.