In a large bowl, mix together all of the meatball ingredients until well-combined.
Spoon the meat mixture with a one tablespoon cookie scoop, shape it into balls, and arrange onto 2 large baking sheets lined with parchment paper.
Bake for 10-12 minutes, or until golden brown and cooked through.
Place a non-stick skillet over medium-high heat. Add all the sauce ingredients to the pan and stir until well blended. Bring to a simmer and continue cooking until sauce thickens, stirring occasionally, for about 8-10 minutes.
When meatballs have finished cooking, add half of them into the pan with the sauce and gently coat each meatball in the sauce.
Transfer the glazed meatballs to a serving dish and repeat with the remaining ones.
Sprinkle with sesame seeds and sliced green onions, and serve with toothpicks or mini forks.