Cut the chicken breast into bite-sized pieces.
Julienne the onion and bell pepper.
Mince the garlic.
Heat cooking oil in a pan and sauté the minced garlic.
Add the chicken breast and stir-fry until cooked through.
Add the onion and bell pepper and stir-fry together.
Add gochujang (Korean chili paste), chili powder, soy sauce, oligosaccharide syrup, and pepper. Stir-fry until the seasoning is evenly mixed.
Finish with a drizzle of sesame oil.