Easy Shrimp Tacos

Name: Easy Shrimp Tacos
Ingredients: 2 cups diced tomatoes; 1 teaspoon lime zest (reserve before juicing limes); 5 tablespoons lime juice, divided; ¼ cup chopped fresh cilantro; ¼ cup diced red onion; 2 tablespoons minced jalapeño pepper; ⅛ teaspoon salt; 2 tablespoons tahini; ½ teaspoon honey; 1 clove garlic, minced; 2 tablespoons olive oil; 1 tablespoon ground cumin; 2 teaspoons ground coriander; ¼ teaspoon ground pepper; 1 pound large raw shrimp (21-25 count; see Tip), peeled and deveined; 8 (6 inch) flour tortillas, warmed; 1 cup thinly sliced radishes