01 - Preheat oven to 400°F. Line a baking sheet with parchment paper or lightly grease it.
02 - In a large bowl, combine ground beef, garlic, onion, egg, breadcrumbs, Sriracha, soy sauce, sesame oil, ginger, salt, and pepper. Mix until just combined—do not overwork.
03 - Shape the mixture into 20 evenly sized meatballs and arrange them on the prepared baking sheet.
04 - Bake for 15–18 minutes, until the meatballs are browned and cooked through.
05 - While meatballs bake, whisk together Sriracha, honey, soy sauce, rice vinegar, and sesame oil in a small saucepan. Heat over medium and simmer for 2–3 minutes, until slightly thickened.
06 - Remove meatballs from oven and transfer to a large bowl. Pour the glaze over the meatballs and toss to coat evenly.
07 - Sprinkle with toasted sesame seeds and, if desired, chopped scallions. Serve hot, as an appetizer or with steamed rice or noodles.