How to Make It
Fill a large bowl with ice and water. In another bowl, combine the bread, almonds, grapes, cucumber and garlic with the water, oil and vinegar. Working in batches, puree the mixture in a blender, then strain through a fine sieve into a large bowl set in the ice bath. Stir the soup until chilled; season with salt and cayenne. Reserve the ice bath.
In a medium saucepan of boiling salted water, cook the shrimp until opaque, about 2 minutes. Drain and refresh in the ice bath until chilled. Drain well, pat dry and cut into quarters crosswise.
Ladle the soup into chilled bowls. Garnish with the shrimp, tomato, celery and cilantro and serve.