In a bowl, combine miso paste, soy sauce, honey, rice vinegar, sesame oil, garlic, and ginger.
Place the salmon fillets in a shallow dish and pour the marinade over them.
Cover and refrigerate for at least 30 minutes.
Preheat your oven to 400°F (200°C).
Line a baking sheet with parchment paper.
Remove the salmon from the marinade and place on the baking sheet, skin-side down.
Bake for 15-20 minutes until cooked through.
Broil for an additional 2-3 minutes for a caramelized finish.
Garnish with sliced green onions and sesame seeds before serving.