In a large mixing bowl, combine the ground turkey, breadcrumbs, finely chopped green onions, cilantro, beaten egg, minced garlic, grated ginger, and 1 tablespoon of soy sauce. Season the mixture with salt and pepper. Use your hands or a spoon to mix until everything is evenly incorporated.
Preheat your oven to 400°F (200°C). Line a baking sheet with parchment paper to prevent sticking and make cleanup easier.
Using your hands, shape the turkey mixture into meatballs, approximately 1 inch in diameter, and arrange them on the prepared baking sheet, leaving a little space between each meatball.
Bake the meatballs in the preheated oven for about 20 minutes, or until they are cooked through and golden brown on the outside. A meat thermometer should register 165°F (75°C) when done.
While the meatballs are baking, prepare the teriyaki glaze. In a small saucepan, whisk together the remaining 2 tablespoons of soy sauce, honey, sesame oil, and rice vinegar. Place the saucepan over medium heat and stir the mixture until it reaches a gentle simmer and thickens slightly, about 5 minutes.
Once the meatballs are cooked, transfer them to the saucepan with the teriyaki glaze. Gently toss the meatballs in the sauce to ensure they are well-coated.
Serve the teriyaki turkey meatballs over a bed of steamed rice or alongside steamed broccoli. For an extra touch, sprinkle sesame seeds on top as a garnish.
Notes
For extra flavor, let the meatballs marinate in the glaze for a few minutes before serving.