01 - Set the oven to 400°F and prepare a baking sheet lined with parchment paper.
02 - Combine ground beef, minced garlic, grated ginger, chopped green onions, egg, panko breadcrumbs, Sriracha, soy sauce, sesame oil, salt, and pepper in a large bowl; mix until just combined.
03 - Shape the mixture into 20 to 24 small meatballs and arrange them evenly on the prepared baking sheet.
04 - Bake for 15 to 18 minutes until fully cooked and lightly browned.
05 - While baking, whisk together Sriracha, honey, soy sauce, rice vinegar, and sesame oil in a small saucepan over medium heat; simmer for 2 to 3 minutes until slightly thickened.
06 - Transfer baked meatballs to a large bowl, pour the sauce over, and gently toss to evenly coat.
07 - Arrange meatballs on a serving platter, then sprinkle with toasted sesame seeds, sliced green onions, and cilantro leaves if desired; serve hot.