1. In a large bowl, combine ground beef, breadcrumbs, egg, garlic, ginger, green onions, soy sauce, sesame oil, salt, and pepper. Mix until just combined. Form mixture into 1 to 1.5-inch balls and place on a parchment-lined baking sheet. Bake at 400°F for 18–20 minutes until cooked through. Meanwhile, in a saucepan combine gochujang, soy sauce, brown sugar, rice vinegar, and honey. Simmer 3–5 minutes until slightly thickened. Toss baked meatballs in the glaze to coat evenly. In a bowl, mix mayonnaise with sriracha and a drizzle of sesame oil to make the spicy mayo dip. Serve meatballs garnished with sesame seeds and green onions, alongside spicy mayo. Enjoy hot.