Wash and peel the potatoes, then slice them into very thin rounds with a sharp knife.As you slice the potatoes, heat the oil in a deep pan over medium-high heat until it reaches 400°F.
Once all the potatoes are sliced, pat them dry with a paper towel to remove excess moisture.Carefully add the potato slices to the hot oil, frying in batches if needed. Stir gently every couple of minutes to ensure even cooking.