Preheat your oven to 400°F (200°C). This ensures that your salmon and veggies cook evenly and thoroughly.
In a mixing bowl, whisk together the low-sodium soy sauce, 2 tablespoons of water, honey, rice vinegar, minced garlic, minced ginger, sesame oil, and cornstarch until smooth. This flavorful sauce is the star of the show, infusing all the ingredients with a delicious teriyaki flavor.
In another bowl, combine the broccoli florets and sliced carrots. Drizzle with olive oil and season with salt and freshly ground black pepper. Toss until the veggies are well-coated.
Cut four large pieces of aluminum foil, about 12 inches long. Place a salmon fillet in the center of each piece of foil. Divide the vegetable mixture evenly among the four packets, placing them around the salmon. Drizzle the prepared honey teriyaki sauce over the salmon and veggies, making sure to coat everything well.
Fold the sides of the foil over the salmon and veggies, then fold the ends up to create a sealed packet. This will keep all the flavors and moisture inside while baking.
Place the foil packets on a baking sheet and bake in the preheated oven for 15-20 minutes, or until the salmon is cooked through and flakes easily with a fork. The veggies should be tender but still vibrant.
Carefully open the foil packets (watch out for hot steam!) and transfer the contents to plates. Garnish with chopped green onions and sesame seeds. Serve with cooked brown or white rice for a complete meal.