For preparing spaghetti with chicken fajitas, first marinate chicken slices in mustard sauce, brown sugar, salt, pepper and cumin powder.
Hat oil in a pan, add garlic and onion.
Add chicken and bell peppers.
Fry till chicken is tender.
Meanwhile, boil water in vessel and cook spaghetti in it.
Drain and keep it in a serving plate.
Sprinkle parsley on it.
Place the chicken fajitas on top of it with the juice.
Spaghetti with chicken fajitas is ready.