In a mixing bowl, whisk together the soy sauce, grated ginger, honey, sesame oil, minced garlic, and rice vinegar until well combined.
Place the salmon fillets in a shallow dish and pour the marinade over them, ensuring they are evenly coated. Allow to marinate for at least 30 minutes in the refrigerator.
Preheat your grill or oven to medium-high heat (375°F / 190°C).
Remove the salmon from the marinade, reserving the remaining marinade for later.
Season the fillets with a pinch of salt and pepper. If grilling, place the salmon skin-side down and grill for approximately 4-5 minutes on each side, until cooked through and flaky. If baking, place on a lined baking sheet and bake for about 12-15 minutes, basting with the reserved marinade halfway through.
Once cooked, sprinkle sesame seeds over the top for added crunch and flavor.
Serve the salmon on a plate, garnished with chopped green onions and an extra drizzle of the marinade for added flavor.
Notes
For best results, marinate the salmon for at least 30 minutes.