Prepare Coriander Paprika Spice Rub. In medium bowl toss shrimp with spice rub; set aside. Thinly slice enough cucumber measure 1/3 cup; set aside. Peel, seed, and cut up remaining cucumbers.
In blender, combine cut-up cucumbers, chickpeas, tahini, mint, lemon juice, olive oil, honey, garlic, coriander, cayenne, and 1/4 teaspoon each salt and black pepper. Cover; blend until smooth, scraping sides as needed.
Just before serving, with motor running, add ice cubes, a few at a time, through lid opening until smooth and thickened (blender will be full). Pour into bowls. Top soup with shrimp, sliced cucumber, tomatoes, and green onions. Makes 4 to 6 servings.
Coriander-Paprika Spice Rub
In small bowl combine coriander, paprika, salt, and pepper.