In a large bowl, combine the ground turkey, breadcrumbs, egg, chopped green onions, minced garlic, and grated ginger. Mix until well combined.
Season the turkey mixture with salt and pepper, then form it into meatballs (about 1 inch in diameter).
Heat a large skillet over medium heat and add a drizzle of oil. Cook the meatballs in batches, making sure not to overcrowd the pan. Brown the meatballs on all sides for about 8-10 minutes.
While the meatballs are cooking, prepare the teriyaki sauce. In a small bowl, whisk together the soy sauce, honey, rice vinegar, and sesame oil.
Once the meatballs are browned and cooked through, pour the teriyaki sauce over them in the skillet. Reduce the heat to low and let them simmer for about 5-7 minutes, allowing the sauce to thicken and coat the meatballs.
Carefully remove the meatballs from the skillet and place them on a serving dish.
Drizzle any remaining sauce over the top, and sprinkle with sesame seeds and additional chopped green onions for garnish.