Lightly grease a frying pan and place over a medium heat.
Place one of the tortillas into your frying pan and add the chicken, avocado and cheeses.
Spread the basil pesto over one side of the remaining tortilla and place on top of the tortilla already in the pan.
Cook the Quesadilla for 3 minutes or until the tortilla begins to brown before carefully flipping over and cooking for another 3 - 4 minutes or until the cheese has melted and the tortilla has browned.
You can leave out the feta cheese if you prefer
These can be eaten hot or cold