Cut the chicken breast into bite-sized pieces.
Dice the onion, carrot, and potato.
Heat cooking oil in a pan and stir-fry the chicken breast.
Add gochujang, minced garlic, soy sauce, and red pepper powder to the chicken and stir-fry.
Add the chopped vegetables and stir-fry together.
Pour in 150ml of water and bring to a boil.
Simmer over medium heat until the ingredients are cooked through.
Finish with sesame oil and ground black pepper.