You can use pre-boiled chicken to make this even easier
Put the chicken in a pan with the stock, bring to the boil then cover and turn down to a low simmer. If you like add some sweetcorn, diced bell peppers and onion in there
Simmer for 15 minutes or until cooked through then shred using 2 forks, leave out the stock but add the veg if you had it in the pan
Cook the rice and mix in with the shredded chicken & veg
Warm the BBQ sauce and add enough to make it taste good - the amount is up to you but don't drown it lol. The amount I've stated is enough to give everything a nice coating
Warm the tortillas for a few seconds in the microwave then divide the mixture between each tortilla
To wrap, fold the top and bottom of the tortillas in towards the middle...
... the fold the left side over the mixture...
... then roll over to the right
Wrap in foil to keep warm
