Set the air-fryer to 400F (or oven to 420F).
In a large bowl, toss the sliced potatoes with oil and seasoning. Add the potatoes to the air-fryer basket. Air-fry for about 20 minutes, or until the potatoes are cooked through and the edges are crispy.
Mix together the ingredients for the sauce.
Cook up some bacon in a skillet until crispy. Allow the pieces to cool on a paper towel, then chop into pieces.
Once the potatoes have finished air-frying, LIGHTLY mash about 40-50% of the potatoes in a bowl, then fold in the remaining potatoes and mix together. Add the sauce and the remaining ingredients and fold everything together.
Season to taste using salt & pepper, dill (or sweet) pickles, mustard or Greek yogurt. Cover with plastic and store in the fridge for at least 20 minutes, but it’s much better overnight.