How to Make It
Set a coarse sieve over a bowl. Halve the tomatoes crosswise and squeeze the seeds and juice into the sieve. Let the liquid drain into the bowl and discard the seeds.
Coarsely chop the tomatoes and transfer to a blender. Add the strained tomato liquid, the scallions, the 1/2 cup each of parsley and celery leaves, the tarragon, lime juice, honey, yogurt and cold water and puree (in batches, if necessary). With the machine on, gradually pour in the olive oil and blend until incorporated. Season the soup with salt and white pepper and refrigerate until chilled. Ladle into small bowls. Garnish with cherry tomatoes and parsley and celery leaves and serve.