Preheat oven to 425°.
Pierce potatoes with a fork (do not wrap in foil). Bake potatoes at 425° for 1 hour or until tender. Cool potatoes 30 minutes.
Meanwhile, heat bacon slices according to package directions until crisp; crumble bacon. Set aside.
Cut potatoes lengthwise into 4 wedges. Scoop out as much potato pulp as possible without tearing potato skins. Reserve potato pulp for another use.
Arrange potato skins on a foil-lined baking sheet. Coat both sides of potato skins with cooking spray; sprinkle evenly with pepper and salt. Bake at 425° for 13 minutes or until lightly browned. Sprinkle skins evenly with bacon and cheese; bake an additional 3 minutes or until cheese melts. Serve immediately with dressing.