Chicken fajita traybake

Name: Chicken fajita traybake
Prep time: 10 min
Cook time: 35 min
Total time: 45 min
Cuisine: American, Mexican, Latin American, TexMex
Ingredients: Low calorie cooking spray (or spray oil if you prefer); 2 onions (halved and then sliced); 3 peppers (I use red, orange and yellow de-seeded and cut into strips); 3 chicken breasts (sliced into strips); 1 batch of my Fajita Spice Mix (1 tsp chilli flakes, 1.5 tsp cumin, 1 tsp pepper, 1/2 tsp salt, 1/2 tsp oregano, 1/4 tsp garlic powder, 1/4 tsp onion powder); Coriander and lime to serve