In a small mixing bowl, add olive oil, garlic powder, and salt. Combine and set aside.
In a mixing bowl, add lemon juice and ice cold water.
Slice thinly and evenly crosswise, leaving ¾ inch at the bottom so that the slices should not come apart. This step can be made easy by keeping pencils, knives on both the sides.
Immerse these evenly sliced potatoes to lemon+ice cold water mix. Set aside for 10 minutes.
Then pull out each potato and squeeze out the excess water and pat dry-in between the slices as well.
The baking
In a greased baking tray, arrange the potatoes.
Liberally coat with the olive oil and garlic powder mixture. And brush in between the slices as well.
Cover each potato with aluminium foil and bake for 45 minutes in the middle rack.
Then remove it from the oven, again apply oil mixture.
And bake it uncovered further for another 25 min or till they get cooked completely and crispy outside.
Serve as a appetizer, snack or as a side for dinner.