Grape Gazpacho - Alton Brown

Ingredients

• 1 small small cucumber, seeded and chopped
• 1 medium Granny Smith apple, peeled, cored, and chopped
• 3 medium tomatillos, chopped
• 1 pound seedless green grapes
• 1 cup chopped walnuts, toasted
• 1 cup plain yogurt
• 1 cup white grape juice
• 1 teaspoon rice wine vinegar
• 6 large mint leaves
• Kosher salt, to taste