Coat/spray the air fryer basket with oil and set aside
Place the chicken on a chopping board then cover over the chicken with cling film (saran wrap). Use your mallet/tenderise to hit the chicken several times all over to soften and flatten it out.
Place all of the ingredients for the breading in a large bowl and mix thoroughly
Crack the eggs in another medium sized bowl and beat together to make the egg wash and place next to the breading
Dip one chicken breast at a time in the egg wash. Then use a pinching motion using your index finger (or tongs) and thumb to pick up the chicken breast. Allow the excess to drip back into the bowl before placing the bowl with the breadcrumbs.
Place the chicken in the breading (still holding onto the chicken in a pinching motion) and roll the chicken into the breadcrumbs while still holding onto the chicken breast using the pinching motion. Pile any extra crumbs on if there are any uncoated areas.
Pull the chicken from the breading (still pinching it in place) and shake off the excess crumbs
Repeat the above 3 steps with the remaining chicken
Place each chicken in the air fryer basket (work in batches if necessary) and drizzle/spray a small amount of oil top of the chicken fillets.
Switch the air fryer on then select M temperate for 14 minutes at temperature 180c/356F making sure to turn half way through.