Cut each potato in half lengthwise, and use a small spoon to scoop out inside leaving about 1/4 in. shell all around. Slice each potato shell in half again. lengthwise to make 16 wedges, and place them on a baking sheet.
Combine oil, salt and pepper in a small bowl, brush on all sides of potato wedges. Bake on highest rack until crisp and edges are golden, about 20 min. Season with salt.