With a mandoline slice with the finest disc the for apples. Aprox 2mm slices

Spray some pam on the baking pan. add the slices without layering them. Spray some pam over the apple slices again.

Put in the oven (preferably a convection oven, if your oven doesn't have a fan maybe it's better to regulate it to 100 C for a little more time) at 130C for 35 minutes or until apples look golden. Take the apples out and wait for 2 minutes for the apples to become crispy if this doesn't happen put inside the oven for some extra cooking.