In a medium bowl, combine ground chicken, green onion, garlic, Chinese five-spice, coconut aminos, ½ teaspoon of salt, and ¼ teaspoon of pepper. Mix well with your hands. Lightly moisten a large plate with water. With wet hands to prevent sticking, shape the mixture into even-size meatballs, about 1¼ inches each; place on the moistened plate.
In a medium sauté pan, heat the sesame seed oil over medium heat. Working in batches, add the meatballs and cook, turning often, until nicely browned on all sides and cooked through, about 7-8 minutes. Transfer to a plate lined with a paper towel to drain.