Finely chop the onion and carrot. You can use only onion if preferred.

Mix ground beef, ground pork, carrot, onion, a pinch of salt, and 1 tbsp cooking wine.

Shape the mixture into round meatballs.

Coat the meatballs with 2 tbsp cornstarch.

Heat 5 tbsp cooking oil in a pan and pan-fry the meatballs until golden brown.

Remove the cooked meatballs and set them aside.

In the same pan, combine soy sauce, sugar, vinegar, and cooking wine. Bring to a boil.

Mix 2 tbsp water with 1 tbsp cornstarch and add to the boiling sauce. Stir until thickened.