Pre-heat the oven to 180c.
Spray the base of a deep, nonstick baking tray with low-calorie cooking spray and spread the onions, peppers and chicken over in an even layer.
Sprinkle the fajita spice mix evenly over the top, and give it all a shuffle around to coat in the spices
Spray with cooking spray (or spray oil)
Pop the baking tray into the oven and bake for 35-40 minutes until the chicken is cooked through, and the peppers and onions are cooked and very slightly charred.
Serve with fresh lime wedges and coriander
