Remove the seeds and pith from the pepper, peel the cucumber, then cut the cucumbers, pepper, and red onion into medium size pieces. Put them in a large flat bottom bowl with the tomatoes. Tear the bread into large pieces and add it to the bowl with the tomatoes. Using a mortar and pestle grind the garlic, cumin seeds, smoked paprika, and salt into a paste. Add the paste to the tomato mixture. Let everything stand for 15 minutes for the flavors to combine. Add the olive oil and use a stick blender to puree the mixture to the consistency of a smoothie. Mix in the spring water and vinegar. Taste for seasoning and add more salt, and/or vinegar as needed. Some people like to add a few turns of fresh ground pepper before serving.