Everyone can make their own fajitas just the way they want them.
1. Add the oil to a wok or large pan set on a high heat and heat up for 1 minute. Add the onion and fry for 3 minutes, stirring regularly. Add the garlic and chilli and cook for 2 minutes, continuing to stir. Add the peppers and mushrooms and cook for 5 minutes, stirring regularly. Transfer to a serving bowl.
2. Put the grated carrot, sweetcorn, shredded lettuce, fresh coriander and lime wedges in separate bowls.
3. Put the wraps or tortillas on the table along with all the bowls and any of the optional extras. Now comes the fun bit where everyone puts together their fajitas the way they like!