Green Gazpacho

Cover bread with water in a small bowl, and let stand for 5 minutes. Remove bread and squeeze out excess moisture.

Combine the moistened bread, garlic, parsley and cilantro in a food processor or blender; puree until smooth. Set aside about one-third of the scallions, cucumber, bell pepper and grapes. Add the remaining scallions, cucumber, bell pepper and grapes to the food processor, along with celery, cumin, coriander, cayenne, lemon juice and vinegar; process until smooth. Transfer the mixture to a large bowl and stir in yogurt, broth and the reserved scallions, cucumber, bell pepper and grapes. Season with salt and pepper. Cover and refrigerate until chilled, at least 1 hour. Garnish each portion with avocado cubes.