Preheat the oven to 425º F.
Whisk 2 tablespoons of the sesame oil in a mixing bowl with the ginger, garlic, soy sauce, and 2 tablespoons of teriyaki sauce. Transfer the salmon fillets to the marinade, drenching each fillet to ensure coverage. Leave the fillets to marinate skin-side up with the coral sides down in the marinade; set the bowl aside.
In a different mixing bowl, whisk together the remaining 2 tablespoons of sesame oil with the garlic powder, salt, and pepper. Place the chopped veggies into that bowl and toss them to coat.
Prepare a baking sheet lined with parchment paper or a silicone mat. Transfer the chopped veggies to it, making sure they're nicely spread out. Place them into the oven and roast for 10 minutes.
When 10 minutes is up, take the baking sheet out of the oven and push the veggies off to the sides of the baking sheet with a spatula. Using tongs, transfer the salmon fillets to the middle of the baking sheet.
Place the baking sheet back into the oven for another 10-12 minutes, or until the salmon registers at 135-140º F using a meat thermometer.
When the salmon is done, remove the baking sheet out of the oven, brush the rest of the teriyaki sauce over the salmon fillets, and garnish with sesame seeds and hot chili sauce like, sambal oelek or Sriracha, if you like it spicy.