Begin by preheating your oven to 400°F (200°C). Line a baking sheet with parchment paper for easy cleanup.
In a large mixing bowl, thoroughly combine the ground chicken, panko breadcrumbs, finely chopped green onions, minced garlic, minced ginger, egg, soy sauce, sesame oil, and a generous pinch of salt and pepper. Use your hands or a spatula to ensure everything is well-mixed and cohesive.
Shape the mixture into small meatballs, about 1 inch in diameter, making sure they are compact. Arrange the meatballs evenly on the lined baking sheet.
Bake in the preheated oven for 15-20 minutes, or until the meatballs are lightly browned and reach an internal temperature of 165°F (75°C).
While the meatballs are baking, prepare the teriyaki sauce. In a small saucepan, combine the soy sauce, honey, rice vinegar, and water. Heat over medium heat, stirring occasionally, until the mixture simmers gently.
In a separate small bowl, combine the cornstarch with a splash of water to make a slurry. Gradually whisk this slurry into the simmering sauce, ensuring there are no lumps. Cook for another 2-3 minutes, stirring continuously, until the sauce thickens and becomes glossy.
Once the meatballs are cooked, remove them from the oven and transfer them to a large mixing bowl. Pour the thickened teriyaki sauce over the meatballs and gently toss until each meatball is thoroughly coated.
For the finishing touch, garnish the meatballs with sesame seeds and any remaining sliced green onions before serving.
Notes
Serve over rice or quinoa with steamed vegetables.