In a small bowl, whisk together the soy sauce, grated ginger, honey, minced garlic, sesame oil, rice vinegar, and black pepper until well combined.
Place the salmon fillets in a shallow dish and pour the ginger soy marinade over the salmon, making sure each fillet is well coated. Cover and refrigerate for at least 30 minutes to allow the flavors to penetrate.
Preheat your grill or oven to 400°F (200°C).
If using a grill, oil the grates lightly. If using the oven, place the salmon on a baking sheet lined with parchment paper.
Remove the salmon from the marinade, reserving the marinade for later.
Grill the salmon for about 4-6 minutes per side, or bake in the oven for 12-15 minutes, brushing with reserved marinade during cooking for added flavor. The salmon should flake easily with a fork when done.
Once cooked, remove the salmon from the heat and let rest for a couple of minutes.
To serve, transfer the salmon fillets to plates, drizzle with any remaining glaze from the baking tray or grill, and garnish with sliced green onions and sesame seeds for a beautiful finish.
Notes
Marinate the salmon for at least 30 minutes for best flavor.