Preheat an air fryer to 350 degrees F (175 degrees C)
Slice the potatoes:
Set a potato on a cutting board and place a chopstick on either side of the potato.
With a sharp, thin knife, make deep vertical cuts 1/8-inch apart, but without cutting all the way through the potato. The chopsticks should keep you from accidentally cutting too deeply or going all the way through.
We put the potatoes at 180 degrees for 35-40 minutes (it will depend on the size of your potatoes, so it is best to watch those last 5 minutes to achieve the desired finish).
We remove the potatoes and serve in each piece a square piece of cheese and a piece of serrano meat in our case (the original recipe calls for cheddar and bacon)
Again we give it 180 degrees and this time 8 minutes until the cheese and ham soften.
When 1-2 minutes are left, open the frying pan and sprinkle the potatoes with thyme and a pinch of salt to give
