1In shallow glass or plastic dish or resealable food-storage plastic bag, mix marinade ingredients. Add fish steaks, turning several times to coat with marinade. Cover; refrigerate 15 minutes, turning once.
2Heat gas or charcoal grill. Remove fish from marinade; discard marinade.
3Place fish on grill over medium heat. Cover grill; cook 10 to 20 minutes, turning once, until fish flakes easily with fork. Sprinkle with pepper. Serve with salsa.