01 - Preheat oven to 400°F and line a baking sheet with parchment paper.
02 - In a large bowl, mix ground beef, garlic, green onions, egg, soy sauce, panko, sesame oil, gochujang, brown sugar, ginger, black pepper, and salt until just combined.
03 - Form mixture into 20–24 bite-sized meatballs and arrange on prepared baking sheet.
04 - Bake for 20–25 minutes, turning once halfway through, until browned and cooked through.
05 - While meatballs bake, whisk mayonnaise, sriracha, lime juice, sesame oil, honey, and salt in small bowl until smooth. Adjust sriracha to taste.
06 - Transfer meatballs to serving platter, sprinkle with sesame seeds and green onions. Serve hot with spicy mayo dip.