Wash and blanch tomatoes, peel, cut into quarters, remove seeds and chop roughly.
Cut off the sides of bread slices and soak in a little water. Puree the tomatoes, cucumber, capsicums, onion and garlic in a blender.
Add half a cup of water if needed Squeeze out the bread slices and blend along with other ingredients.
Add olive oil while blending. Transfer to a bowl. Add salt and cumin powder and mix.
Add lemon juice (or vinegar) and mix. Add about three cups of chilled water to adjust the consistency. Chill at least for an hour or two before serving.