01 - Preheat your 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, until browned and cooked through.
05 - While the meatballs are baking, mix all spicy mayo dip ingredients in a small bowl until smooth. Adjust sriracha to desired heat.
06 - Arrange cooked meatballs on a serving platter. Sprinkle with toasted sesame seeds and sliced green onions. Serve hot with the spicy mayo dip on the side.