Preheat oven to 450.
Cut a thin, lengthwise slice off the bottom of the potatoes so they will not roll.
Cut potato crosswise without going all the way to the bottom. Do this for all the potatoes.
Place potatoes on a foil-lined baking sheet. Brush with half of the melted butter and bake for 35-45 minutes or until tender.
Turn on broiler. While broiler is heating up, add cheese slices in every other potato slice and bacon in the other slices.
Combine remaining Italian dressing and Parmesan and drizzle over potatoes. Top with chives and broil for a few minutes.