Preheat the oven to 450º. Slice potatoes thinly on a mandoline (1/8- to 1/4-inches thick). Lay the slices on a sheetpan. Drizzle with olive oil. Season all over with salt and pepper. Toss, then lay potatoes back into a single layer. Place in the oven and cook for about 15 minutes, checking after 10. If they are browning unevenly after 10 minutes, turn the oven down to 400º.