Preheat the oven to 400°F (200°C).

In a mixing bowl, combine ground beef, breadcrumbs, Parmesan cheese, green onions, egg, minced garlic, black pepper, and salt.

Shape the mixture into 1-inch meatballs.

Place the meatballs on a baking sheet lined with parchment paper and bake for 15-20 minutes until cooked through and browned.

While the meatballs are baking, heat the teriyaki sauce in a saucepan over medium heat.

Once the meatballs are cooked, transfer them to the saucepan and gently toss to coat with teriyaki sauce.

Sprinkle sesame seeds over the glazed meatballs before serving.

Serve the teriyaki meatballs hot over rice or with steamed vegetables.