Cut onion, zucchini, carrot, and chicken breast into bite-sized pieces.
Add olive oil to a pan, then stir-fry the onion, carrot, and zucchini.
Add chicken breast and stir-fry until cooked.
Add low-sugar jajang powder and water, then simmer over low heat.
Place tofu rice on a plate and pour the finished jajang sauce over it.