Mix ground beef and ground pork in a bowl.

Add minced garlic, chopped green onion, oyster sauce, salt, sesame oil, sesame seeds, sugar, and breadcrumbs to the meat mixture.

Knead the meat mixture thoroughly until well combined.

Shape the mixture into round meatballs of your desired size.

Heat a frying pan with adequate cooking oil and fry the meatballs, rolling them around to cook evenly.

Remove the cooked meatballs from the pan and set them aside.

In the same pan, mix gochujang, soy sauce, ketchup, and corn syrup to create the sauce. Heat until it simmers.

Add the meatballs to the sauce and roll them around to coat evenly.