Preheat your oven to 400°F (200°C) and line a baking sheet with parchment paper.
In a large bowl, combine the ground chicken, breadcrumbs, green onions, egg, minced garlic, grated ginger, soy sauce, and a pinch of salt and pepper. Mix until just combined.
Form the mixture into small meatballs, about 1 inch in diameter, and place them on the prepared baking sheet.
Drizzle the meatballs with sesame oil, then bake in the preheated oven for 18-20 minutes, or until they are cooked through and golden brown.
While the meatballs are baking, prepare the teriyaki sauce. In a small saucepan, combine the soy sauce, honey, rice vinegar, cornstarch, and water. Cook over medium heat, stirring constantly until the sauce thickens and comes to a simmer. Remove from heat and set aside.
Once the meatballs are done, transfer them to a large bowl and drizzle the teriyaki sauce over them, tossing gently to coat.
Serve the meatballs warm, garnished with sesame seeds and sliced green onions.
Notes
Serve warm and garnish with sesame seeds and sliced green onions.