Preheat oven to 400 degreesCut potatoes into cubesPour oil over the potatoesSprinkle with salt and pepperToss the potatoes and oil together to coat wellBake for 45 minutes, then toss to mix.Bake for another 20 minutes. Toss and mix again.Bake for another 20 minutes. Repeat if necessary. You want them to get a nice, crispy brown on the outside.