Coat potatoes with vegetable cooking spray; pierce several times with a fork.
Bake at 400° for 45 minutes or until tender. Cool and cut into 1-inch cubes.
Combine 1 1/2 cups cheese, dressing, and next 3 ingredients in a large bowl; add potato, tossing gently. Sprinkle with bacon and remaining 1/2 cup cheese.
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