For the Meatballs:Adjust oven rack to center position and preheat oven to 375°F (190°C). Place all the meatball ingredients into a large mixing bowl and, using your hands, mix together until blended (but don’t overmix).
With wet hands (to keep the meatballs from sticking), form 1 to 1 1/2 tablespoon-sized meatballs. (Using a 1/2 ounce portion scoop makes this easier but you can also do it by eye). Place balls about an inch apart on a parchment-lined baking sheet. Bake meatballs until just cooked through, 15 to 20 minutes.
To Serve:
Brush Ty Ling Hoisin Sauce onto meatballs and top with scallions and sesame seeds. Serve with extra hoisin glaze on the side for dipping.