In a blender or food processor, combine the garlic, 3/4 cup of the diced cucumbers, 3/4 cup of the diced bell peppers, the red onions, 1/2 cup of the tomatoes, the pineapple and its juice, vinegar, cayenne, cumin, bread chunks, and tomato juice and puree until smooth.
Transfer to a bowl, then stir in the remaining diced cucumbers, bell peppers, and tomatoes for texture and visual appeal. Add salt and black pepper to taste.
Refrigerate for 1 to 2 hours until cold. Serve garnished with lemon and/or lime slices.