Preheat the Oven: Start by preheating your oven to 400°F (200°C) and line a baking sheet with parchment paper.
Prepare the Meatball Mixture: In a large bowl, combine the ground chicken, breadcrumbs, grated Parmesan, chopped parsley, minced garlic, onion powder, salt, pepper, and beaten egg. Mix until all ingredients are well incorporated.
Form the Meatballs: Use your hands to shape the mixture into small meatballs, about 1 inch in diameter. Place them evenly on the prepared baking sheet.
Bake the Meatballs: Bake the meatballs in the preheated oven for about 20 minutes, or until they are golden brown and cooked through.
Make the Honey Garlic Glaze: While the meatballs are baking, prepare the glaze. In a small saucepan, combine honey, soy sauce, apple cider vinegar, and sesame oil (if using). Cook over medium heat, stirring frequently until the glaze thickens slightly, about 5 minutes.
Glaze the Meatballs: Once the meatballs are done baking, remove them from the oven and toss them in the honey garlic glaze until well coated.
Serve: Transfer the glazed meatballs to a serving platter. Drizzle any remaining glaze over the top and sprinkle with sesame seeds for garnish.