Chop onion, carrot, green onion, and chili pepper into bite-sized pieces.

Heat a wide pan and add 500g pork shoulder. Sprinkle 2 tbsp sugar and stir-fry.

Add 1 tbsp mirin and continue stir-frying until the pork is partially cooked.

Add chopped carrot and onion to the pan and stir-fry until the onion softens slightly.

Mix minced garlic, soy sauce, and oyster sauce into a sauce and add it to the pan. Stir-fry until the pork is fully cooked.

Transfer half of the pork to another pan and add chopped green onion to finish the soy sauce pork stir-fry.

To make the gochujang pork stir-fry, add 1 tbsp gochujang to the remaining pork and stir-fry.