Heat oven to 400 degrees.
Line two large baking sheets with parchment paper and set aside.
Scrub your potatoes clean in cold water.
Fill a large bowl with cold water and set aside.
Slice potatoes using a mandolin set to a super thin slice.
Place potato slices into a bowl of cold water.
Toss them around in the cold water to rinse off all the starches.
Remove from water and lay the potato slices out on a large, clean kitchen towel. Gently pat dry to remove excess water.
Place potato slices in a large bowl. Add vegetable oil and salt.
Toss everything together to coat potato slices.
Spread slices out on prepared baking sheets.
Bake for 20-25 mins, flipping halfway through.