Preheat your oven to 400°F (200°C) and line a large sheet pan with parchment paper.
In a large mixing bowl, combine the ground chicken or turkey, breadcrumbs, green onions, egg, minced garlic, grated ginger, 1/4 cup teriyaki sauce, sesame oil, salt, and pepper. Mix until well combined.
Shape the mixture into meatballs, about 1.5 inches in diameter, and place them evenly spaced on one side of the prepared sheet pan.
On the other side of the sheet pan, toss the broccoli, bell peppers, and snap peas with olive oil, salt, and pepper until evenly coated. Spread the vegetables into a single layer.
Bake in the preheated oven for about 20-25 minutes, or until the meatballs are cooked through and the veggies are tender-crisp.
Remove the sheet pan from the oven and drizzle additional teriyaki sauce over the meatballs and veggies for extra flavor.
Garnish with sesame seeds and additional green onions if desired before serving.
Notes
Drizzle extra teriyaki sauce for added flavor before serving.