Preheat your oven to 400°F (200°C).
In a bowl, mix miso paste, soy sauce, honey, rice vinegar, sesame oil, garlic, and ginger until well combined.
Place the salmon fillets on a lined baking sheet, skin-side down.
Generously brush the miso mixture over the salmon.
Let the salmon marinate for at least 15 minutes.
Bake the salmon in the preheated oven for 12-15 minutes.
Remove the salmon from the oven and let it rest for a few minutes.
Garnish with chopped green onions and sesame seeds.
Serve immediately with your choice of sides.