Preheat oven to 425°F.
Working with one potato at a time, place it between two chopsticks. Use a chef's knife to slice the potato in 1/8-inch thick slices, taking care so you don't slice all the way through the potato (the chopsticks will help).
Brush each potato with oil, then sprinkle with salt and pepper.
Bake 30 minutes. Again, brush each potato with oil and return to the oven for another 30 minutes or until potato edges are crispy.