Preheat the airfryer to 180°C. Soak the potatoes for at least 30 minutes and pat them dry with kitchen paper.
Lightly brush the potatoes with olive oil and place them in the fryer basket. Slide the basket into the AirFryer and set the timer to 30 minutes to fry the potatoes until they are deliciously crunchy and done.
In a bowl, finely mash the tuna and add the yoghurt and chili powder. Mix well. Stir in half of the green onion and season to taste with salt and pepper.
Place the potatoes on two plates and cut the top side lengthwise. Slightly push the potato open and spoon the tuna mixture onto the open potato. Sprinkle the filling with chili powder and spoon the capers and the rest of the green onion on top. Delicious with a fresh salad