Cut the chicken breast into bite-sized pieces.
Slice the onion and green onion into easy-to-eat pieces.
Mix together gochujang, soy sauce, chili powder, minced garlic, and oligosaccharide to make the sauce.
Add the sauce to the chopped chicken breast and mix well.
Heat cooking oil in a pan and stir-fry the chicken breast.
Add onion and green onion, and stir-fry together.
Once the chicken breast is cooked, finish with sesame oil and black pepper.