Toss together the olive oil, potatoes, salt, and pepper in a medium bowl.
Tossing 2 tbsp olive oil, chicken breasts, dried oregano, smoked paprika, shallot, garlic, salt, pepper, and chilli flakes in a large bowl.
Rub all sides of chicken breasts thoroughly.
Place the 2 lemon slices first if you are using them, and then place the butter pieces on each chicken breast.
Select Roast set the temperature to 190°C and the time to 20 mins.
Once the air fryer is preheated, open the air fryer basket, and place the two chicken breasts and the potatoes carefully into the basket. Close the basket.
Meanwhile, add the rest of the extra virgin olive oil, parsley, oregano, dill, red wine vinegar, roasted red pepper, Greek olive mix, salt, and pepper in a bowl.
Once the cooking cycle is done, open the basket and check the temperature of the chicken breasts with a thermometer to reach 75°C. Once the chicken breasts is higher than 75°C, remove the chicken breasts and potatoes, and place them evenly on each serving plate.
Break the feta over the chicken, and then add the dressing.