In a high-speed blender, add plum tomatoes, cucumber, green pepper, jalapeño, shallot, olive oil, vinegar, paprika, sea salt and pepper. Process until smooth, adding cold water as needed to reach your desired consistency. Taste and adjust seasoning, adding more salt, pepper, and vinegar as needed. Chill for at least 1 hour.
One chilled, heat a grill or skillet over medium heat. Brush bread lightly with olive oil, then sprinkle with rosemary. Grill for about 1 minute per side, or until golden brown and toasty.
Divide chilled soup among 4 bowls, add desired garnishes and serve with grilled bread.
