Grease a large rimmed baking sheet (cover with foil and then grease for easier clean-up). Preheat oven to 400F.
Combine sauce ingredients and stir until brown sugar is dissolved.
Place individual salmon slicesin a mixing bowl. Pour the sauce over the salmon, cover with plastic wrap and let marinate 20 minutes (at room temp or refrigerated).
While salmon is baking (20 minutes), transfer remaining marinadeto a small sauce panand bring to a boil then reduce heat to asimmer and cook, stirring occasionally until slightly thickened (3-4 min)then remove from heat.
Once salmon is out of the oven, brush with teriyaki syrup, thensprinkle with chopped green onion and sesame seeds as desired.
Baking times for salmon will vary based on the type of salmon you are using.
Farmed Raised Salmon (like Atlantic Salmon or farmed King Salmon) tend to have a higher fat content so they can be baked for a longer period of time without drying out. Farmed salmon also tends to come in thicker, fattier pieces of salmon which are more forgiving and you can bake longer.
Wild Caught Salmon (like Coho Salmon and Sockeye), tend to be thinner and less fatty fillets (with the exception of WILD Caught King
