In a small mixing bowl, combine the soy sauce, honey, Dijon mustard, rice vinegar, grated ginger, minced garlic, sesame oil, and black pepper.
Whisk the mixture until all ingredients are well blended and smooth.
If desired, pour the glaze into a small saucepan and heat over medium-low heat for about 2-3 minutes to slightly thicken it. Stir occasionally.
Allow the glaze to cool slightly before using.
Brush the glaze over the salmon fillets just before cooking. If grilling, brush the glaze on during the last few minutes of cooking to avoid burning the sugars.
Once the salmon is cooked through, serve and garnish with fresh herbs if desired.
Adjust the sweetness or tanginess of the glaze by modifying the amounts of honey or vinegar based on your preference.
Store any leftover glaze in the refrigerator for up to a week and reheat before using.