Combine first 7 ingredients in bowl.(Can be prepared up to 6 hours ahead. Cover and refrigerate.)
Preheat broiler. Brush both sides of fish with lime juice. Season with salt. Press 1 teaspoon pepper onto 1 side of each fillet. Transfer fish to baking sheet. Broil until just cooked through, about 6 minutes. Transfer fish to plates. Top with salsa and serve.