POUR dressing over fish in shallow glass dish; turn fish over to coat both sides of each steak with dressing. Refrigerate 30 min. to marinate. Meanwhile, combine remaining ingredients. Refrigerate until ready to serve.
HEAT grill to medium-high heat. Remove fish from marinade; discard marinade. Grill fish 6 to 8 min. on each side or until fish flakes easily with fork.
SERVE fish with the papaya mixture.