Clean and cut the chicken into bite-sized pieces.
Dice the potato, carrot, and onion.
Slice the green onion diagonally.
Add cooking oil to a pot and stir-fry the chicken.
Once the surface turns white, add the potato, carrot, and onion and stir-fry together.
Pour in 200ml of water and bring to a boil.
Add gochujang, soy sauce, minced garlic, sugar, and Sriracha sauce.
Simmer over medium-low heat until all ingredients are cooked through.
When the sauce thickens, add the green onion and pepper to finish.