1 - step 1 Soak the potatoes in just-boiled water for 30 mins, then drain and leave to air-dry for 5 mins.

2 - Heat the air fryer to 200C.

3 - Tip the potatoes into a bowl and drizzle over 1 tbsp of the oil and add 1/2 tsp each of salt and freshly ground black pepper.

4 - Mix to coat the potatoes all over, then tip into the air fryer basket and cook for 20-30 mins until crisp and golden.

5 - step 2 Meanwhile, heat the remaining oil in a small pan over a medium-low heat and fry the onion for 8-10 mins until softened but not golden.