In a large bowl, mix the mash potatoes with the onion, spices, salt and chopped coriander leaves.
Slit each pepper lengthwise through the middle and hollow it out by taking out the ribs and seeds. Fill each hollowed out pepper with equal portions of the potato stuffing mix.
Meanwhile, lay a piece of foil on the wire rack of the Airfryer and preheat it to 180C.
Lightly oil the peppers on all sides. Lay the stuffed peppers on the foiled surfaced and air-fry at 180C for 6-8 minutes, depending on the size of the peppers.