Cut chicken into bite-sized pieces.
Cut potatoes, carrots, and onions into large chunks.
Heat oil in a pan and stir-fry the chicken.
When the chicken is half cooked, add the potatoes, carrots, and onions.
Add gochujang (Korean chili paste), soy sauce, sugar, and minced garlic, and stir-fry together.
Pour in enough water to cover the ingredients and bring to a boil.
Simmer over medium heat for 15-20 minutes until all ingredients are cooked through.
Add green onion and spicy chili pepper, simmer for a bit more, then finish.