Puree the grapes, cucumber, bread, olive oil, 2 tablespoons water, the vinegar, garlic and 1 teaspoon salt in a blender until very smooth, at least 1 minute. Refrigerate until chilled, at least 30 minutes.
Season the gazpacho with salt. Divide among small bowls. Drizzle with olive oil and sprinkle with crushed pink peppercorns.
Photograph by Ryan Dausch