Source: https://m.blog.naver.com/junggourmet/223310978871 (adapted from this recipe)
Dice the potatoes and sweet potatoes.
Cut the chicken into bite-sized pieces.
Slice the onion, carrot, and green onion.
Put the chicken, prepared vegetables, potatoes, and sweet potatoes into a pot.
Add soy sauce, gochujang, sugar, minced garlic, pepper, and water, and mix well.
Bring to a boil over medium heat and cook until the vegetables are tender.
Flip and stir once more to let the seasoning soak in well.
Top with green onion, turn off the heat, and finish.