Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large bowl, combine the salmon fillets, broccoli, bell pepper, and snap peas.
Drizzle the olive oil and teriyaki sauce over the salmon and vegetables. Sprinkle with garlic powder, ginger powder, salt, and pepper. Toss gently to coat everything evenly.
Arrange the salmon fillets in the center of the baking sheet and spread the vegetables around them in a single layer.
Bake in the preheated oven for 12-15 minutes, or until the salmon flakes easily with a fork and the vegetables are tender.
Remove from the oven and let it cool for a couple of minutes. Garnish with sesame seeds and sliced green onions if desired.
Serve warm and enjoy!