Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper or lightly grease it.
In a small bowl, whisk together the miso paste, soy sauce, honey, sesame oil, rice vinegar, ginger, and garlic until smooth.
Place the salmon fillets skin-side down on the prepared baking sheet. Brush the miso mixture generously over the top of each fillet.
Bake the salmon in the preheated oven for 12-15 minutes, or until the fish flakes easily with a fork and is cooked through.
Remove the salmon from the oven and let it rest for a couple of minutes. Garnish with chopped green onions and sesame seeds before serving.
Serve immediately with steamed rice and vegetables for a complete meal.