Cut the chicken breast into bite-sized pieces.
Make the marinade sauce with gochujang (Korean red chili paste), soy sauce, oligosaccharide syrup, garlic, and black pepper.
Add the marinade sauce to the chopped chicken breast and let it marinate for 10 minutes.
Heat oil in a skillet and stir-fry the chicken breast over medium heat.
When the chicken is fully cooked, turn off the heat and plate it.