Heat 2 large rimmed baking sheets in the oven for 5 minutes. Drain the potatoes and pat dry. Return the potatoes to a dry bowl, add the oil and toss to coat. Spread the potatoes on the hot baking sheets and bake for about 35 minutes, or until golden brown and crisp, stirring every 10 minutes. If the edges start to darken, stir more often. Season the potatoes with salt and serve.