Source: Bon Appetit, August 2005

1 watermelon, seeded and diced (about 5 cups), divided
1 small cucumber, peeled, seeded, diced (about 1 cup)
1 medium-size red bell pepper, seeded, diced (about 1 cup)
1 medium-size yellow bell pepper, seeded, diced (about 1 cup)
1 small jalapeño chile, seeded, minced
3 pale green inner celery stalks, diced (about 1/2 cup)
1/2 small red onion, diced (about 1 cup)
1/4 cup finely chopped fresh mint
3 tablespoons fresh lime juice
2 tablespoons red wine vinegar
1/4 teaspoon salt
1/2 cup crème fraîche or sour cream

Puree 4 cups watermelon in blender until smooth. Transfer puree to large bowl. Add remaining 1 cup diced watermelon and next 10 ingredients; stir to combine. Cover gazpacho and refrigerate until cold, at least 1 hour and up to 4 hours.

Divide gazpacho among bowls; top with dollop of crème fraîche.