01 - Preheat oven to 400°F. Line a baking sheet with parchment paper.
02 - In a large bowl, combine ground beef, minced garlic, chopped green onions, egg, soy sauce, panko breadcrumbs, sesame oil, gochujang, brown sugar, grated ginger, black pepper, and salt. Mix until just combined.
03 - Form the mixture into 20-24 bite-sized meatballs and arrange on the prepared baking sheet.
04 - Bake for 20-25 minutes, turning once halfway through, until browned and cooked through.
05 - While meatballs bake, mix mayonnaise, sriracha, lime juice, sesame oil, honey, and salt in a small bowl until smooth. Adjust sriracha to desired heat level.
06 - Arrange cooked meatballs on a serving platter. Sprinkle with toasted sesame seeds and sliced green onions. Serve hot with spicy mayo dip on the side.