- Pour ponzu in the bottom of a large glass dish. Add salmon filets, skin side up and marinate in the refrigerator for 30 minutes.
- Heat grill to medium heat (350ºF-375ºF) and grease grill grates liberally with cooking oil.
- Drain marinade from salmon and brush skin with cooking oil. Place salmon on grill skin side down and grill for 4-5 minutes undisturbed with lid closed. Carefully flip salmon and grill for 2-3 minutes longer.
- Serve hot garnished with green onion and lime slices.