One can eat 2 kilograms of boiled potatoes, refrigerated, cut into very thin slices and then air-fried at 400F for 15-20 minutes with a drizzle of avocado or extra-virgin olive oil. Some rosemary too. An overall increase of about 150 calories per kilogram compared to boiled potatoes only.

The flavor is similar to that of French fries and they are an excellent substitute (I say this as someone who when asked what would be his last meal would answer: french fries).