Shred the cheese and set aside
Cut the avocado in half, remove the pit, cut out small pieces but don't mash it completely, set aside.
Heat up the shredded chicken with some bbq sauce and set aside
Heat up a pan on medium heat with some butter
Add one tortilla then spread shredded cheese on it, then add the filling on half the tortilla.
Fry until tortilla starts to get some color, then turn the empty side over the filling and transfer to your plate. Cut in 3 equal pieces with a knife or a pizza cutter.