How to Make It
Preheat grill to high heat.
Combine first 8 ingredients in a bowl; add jalapeño, if desired. Sprinkle mixture with 1/4 teaspoon salt; toss gently. Sprinkle fillets evenly with remaining 3/4 teaspoon salt and black pepper. Place the fillets on a grill rack coated with cooking spray, and grill for 10 minutes or until desired degree of doneness, turning after 5 minutes. Serve with salsa.