Once the potatoes have been prepared, boil a litre of water then add to stockpot or pressure cooker
If using the pressure cooker, cook on high for 15 minutes and then release the pressure immediately. If using a stockpot on the stove, the potatoes will take around 30 minutes. You want them to be very well cooked but still intact
Preheat the oven to 230C/450F fan forced/convection.
Let the potatoes cool a bit, around 5 minutes
Using a fork, roughly scape the surface of the potatoes
Place half the potatoes in a mixing bowl, cover with half the oil and then half of the salt. Mix to coat the potatoes
Place the potatoes on a baking tray lined with aluminium foil.
Repeat step 6 with the remaining potatoes, oil and salt.
Place remaining potatoes on baking tray and place in oven.
Bake for 20 minutes, remove from the oven and coat with any oil on the tray (or use oil spray if needed).
Return to the oven to bake for a final 10 minutes (make sure the tray has been turned around so that the pieces bake evenly)
Serve immediately or use as leftovers.