Preparation Combine zucchini, chopped cilantro, and next 4 ingredients in blender. Add 1 1/4 teaspoons coarse salt. Puree until salsa is smooth. do ahead Can be made 2 hours ahead. Transfer to small bowl. Cover; chill. Preheat broiler. Line broiler pan with foil; coat foil with nonstick spray. Combine 1 1/4 teaspoons pepper, coriander, and remaining 1 teaspoon coarse salt in small bowl; stir to blend. Pat fish dry. Sprinkle fish on all sides with seasoning mixture. Arrange fish on prepared pan. Broil until just opaque in center, 3 to 4 minutes per side, depending on thickness. Transfer fish to plates. Spoon some salsa over. Garnish with cilantro leaves. Serve with remaining salsa.
Preparation Combine zucchini, chopped cilantro, and next 4 ingredients in blender. Add 1 1/4 teaspoons coarse salt. Puree until salsa is smooth. do ahead Can be made 2 hours ahead. Transfer to small bowl. Cover; chill. Preheat broiler. Line broiler pan with foil; coat foil with nonstick spray. Combine 1 1/4 teaspoons pepper, coriander, and remaining 1 teaspoon coarse salt in small bowl; stir to blend. Pat fish dry. Sprinkle fish on all sides with seasoning mixture. Arrange fish on prepared pan. Broil until just opaque in center, 3 to 4 minutes per side, depending on thickness. Transfer fish to plates. Spoon some salsa over. Garnish with cilantro leaves. Serve with remaining salsa.