Cut the chicken into bite-sized pieces.
Slice vegetables like cabbage, sweet potato, and green onion into pieces that are easy to eat.
Make the marinade (gochujang, red pepper powder, soy sauce, garlic, etc.) and mix it well with the chicken and vegetables.
Add cooking oil to a pan and stir-fry the marinated chicken and vegetables.
Stir-fry over medium heat, stirring continuously, until the chicken is cooked through.
Plate the finished spicy dakgalbi and serve.