Soak bread in a cup of water for 5 minutes, then squeeze out the excess water. Place the bread in a blender or food processor with tomatos, peppers, cucumber, 6 cups water, garlic and vinegar. Process until smooth, then add the olive oil slowly with the machine running. Season with salt and black pepper and refergerate until ready to serve. (flavor will improve over a few hours) Before serving re-check the seasoning and adjust as needed.