In a medium bowl, whisk together the soy sauce, honey, rice vinegar, minced garlic, grated ginger, and sesame oil until well combined.
If you prefer a thicker glaze, mix the cornstarch with a tablespoon of cold water until smooth, then stir it into the sauce mixture. Set aside.
Preheat your oven to 375°F (190°C) and line a baking sheet with parchment paper.
Place the salmon fillets on the prepared baking sheet, skin-side down.
Brush the teriyaki glaze generously over the top of each salmon fillet. Reserve some glaze for basting during cooking.
Bake the salmon in the preheated oven for about 15-20 minutes, until cooked through and flaky. Baste the salmon with more glaze halfway through cooking for extra flavor.
Optional: For a caramelized finish, broil the salmon for the final 2-3 minutes, watching closely to prevent burning.
Once cooked, remove the salmon from the oven, and let it rest for a couple of minutes.
Garnish the glazed salmon with sliced green onions and a sprinkle of sesame seeds before serving.
Notes
For a thicker glaze, use cornstarch mixed with water.