In a bowl, add the olive brine and buttermilk and beat until well combined.
In a resealable plastic bag, place the turkey breast, buttermilk mixture and herb sprigs
Seal the bag and refrigerate for about 8 hours.
Remove the turkey breast from the bag and set aside until it reaches room temperature.
Grease the Air Fryer Basket with cooking spray and then slide inside.
Adjust the temperature of Air Fryer to 350 °F to preheat for 5 minutes.
After preheating, arrange the turkey breast into the greased Air Fryer Basket.
Slide the basket into Air Fryer and set the time for 20 minutes.
After15 minutes of cooking, flip the turkey breast once.
After cooking time is finished, remove the turkey breast Air Fryer and place onto a platter.
Cover the turkey breast with a piece of foil loosely for about 10-15 minutes before slicing.
Cut the turkey breast into desired-sized slices and serve.