DO-AHEAD TIP: Toast sesame seeds. Marinate salmon for 15 minutes (see recipe).
Place salmon in a large zipper-topped plastic bag.
In a small bowl, whisk together next 5 ingredients (green onion through sesame seeds) until well blended. Add half of the soy sauce mixture (reserving the other half for later use). Turn to coat, seal bag and refrigerate for 15 minutes.
Preheat grill to MEDIUM. Lightly coat grill grate with olive oil. Grill fillets for 5 minutes then turn and cook for 4 minutes. Remove from grill.
Pour remaining sauce over salmon, serve, and enjoy!