Slice the potatoes into waffle shapes using a Mandoline.
Place the potato slices in a large bowl of cold water. Allow them to soak in the water for at least 20 minutes.
In a large pot or deep fryer, heat your oil to 320 degrees F.
Drain out the cold water then thoroughly dry your sliced potatoes before placing them inside the deep fryer. Fry them for 3-4 minutes in small batches.
After 4-5 minutes, remove them from the oil and allow them to cool on paper towels.
Increase your oil temperature to 375 degrees F.
Return the potatoes to the oil and allow them to cook for an additional 2-3 minutes or until they are golden and crispy.
Remove from the oil and transfer to towel-lined baking sheets.
Sprinkle with sea salt or preferred waffle seasoning.
Serve and enjoy while hot!