01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large bowl, combine ground beef, garlic, ginger, onion, sriracha, soy sauce, cilantro, egg, breadcrumbs, salt, and pepper. Mix until just combined; do not overwork.
03 - Shape the mixture into 20 small meatballs and arrange them on the prepared baking sheet.
04 - Bake meatballs for 15–18 minutes, or until cooked through and browned.
05 - While meatballs bake, whisk together sriracha, honey, soy sauce, rice vinegar, and toasted sesame oil in a small saucepan. Heat over medium-low, stirring, until slightly thickened (about 3 minutes).
06 - Remove meatballs from the oven and transfer to a large bowl. Pour the hot sauce over the meatballs and toss gently to coat.
07 - Arrange meatballs on a serving platter. Sprinkle with toasted sesame seeds, green onions, and extra cilantro if desired. Serve hot.