Allow salmon to come to room temperature for 15-20 minutes. The colder the salmon is prior to cooking, the higher the chance it is to overcook the outside before the middle is cooked.
make the sauce:Whisk soy sauce, brown sugar, white miso, rice vinegar, garlic, ginger and red pepper chili flakes together.
pour 1/2 cup of sauce on top of salmon fillets
garnish with toasted sesame seeds and green onions