Preheat the oven to 400°F (200°C). Line a baking sheet with parchment paper.
In a small bowl, whisk together the miso paste, honey, soy sauce, rice vinegar, and sesame oil until smooth.
Place the salmon fillets on the prepared baking sheet and brush the miso glaze generously over the top of each fillet.
Bake the salmon in the preheated oven for 12-15 minutes, or until it flakes easily with a fork.
While the salmon is baking, heat the olive oil in a large skillet over medium heat. Add the minced garlic and sauté for about 1 minute until fragrant.
Add the green beans to the skillet, season with salt and pepper, and sauté for 5-7 minutes until tender-crisp.
Once the salmon is done, remove it from the oven and let it rest for a few minutes. Serve the salmon with the garlic green beans on the side.
Garnish with sesame seeds and chopped green onions if desired.