Set a rack over a large rimmed baking sheet. In a large, deep skillet, heat 1/4 inch of olive oil. Add the potatoes and fry over moderate heat, turning once, until just softened, about 7 minutes. Increase the heat to high and cook, turning once, until golden and crisp, about 5 minutes. With a slotted spoon, transfer the potatoes to the rack to drain. Season the potatoes with salt.