Spray a pan with low calorie cooking spray and cook the sliced chicken for 5 minutes. Add the spice mix and tomato puree and cook for 3 minutes.
Add the sliced peppers and onions, along with 200ml of water and mix well. Leave to cook for 10 minutes until the chicken is cooked through and the peppers and onions have just started to soften.
Drain the pasta and combine with the chicken fajita mix. Serve with a dollop of fat free yoghurt, or a different topping of your choice!