Low calorie cooking sprayor spray oil if you prefer
Coriander and lime to serve
Pre-heat oven to 180c. Heat a wok or large frying pan with cooking spray (or spray oil) and throw in the onion, stir frying for about 4 minutes, until starting to soften.
Add in the chopped chicken and stir fry for a further 4 minutes until no pink is showing
Add in the chopped peppers, and the fajita spices, stir well, and and cook for about 5 minutes, stirring every now and then
In a good sized baking dish, spread one of the grated sweet potatoes over the bottom of the dish, add half of the chicken fajita mix, sprinkle over half of the black beans, then spoon over half of the tin of chopped tomatoes, sprinkle on half of the jalapenos and then half of the grated cheddar.
Repeat the layers (sweet potato, fajita mix, black beans, chopped tomatoes, jalapenos, cheese)
Pop into the oven and bake for 35 minutes until the cheese on top is golden.
Serve with fresh lime wedges and coriander, or a lime dressed crunchy salad.
I make my own fajita spice mis- it's so easy to do once you have the ingredients and it has the added bonus of being syn free, but if you don't have time you can use a bought one (check the syns though). You could also replace the black beans with refried beans (Old el paso are syn free) which are also lovely.