Preheat oven to 400°F (200°C) or heat oil in a large skillet over medium heat.
In a mixing bowl, combine ground meat, egg, breadcrumbs, garlic, soy sauce, salt, pepper, and green onions. Mix just until combined.
Form into 1-inch meatballs and place on a baking sheet (or sear in batches in a skillet).
Bake for 15-18 minutes or cook in skillet until browned and cooked through.
Meanwhile, combine Sriracha, honey, soy sauce, vinegar, sesame oil, and garlic in a saucepan. Simmer 3-4 minutes.
Optional: Mix cornstarch and water, stir into sauce, and cook until slightly thickened.
Toss cooked meatballs in the sauce until well coated.
Garnish with sesame seeds or chopped scallions. Serve hot.
