Preheat oven to 400 degrees.
Fit a large, rimmed sheet pan with parchment. Reserve.
Wash the potatoes, and slice1/8-inch apart, and stopping approximately ¼-inch from the bottom. (Remember, a chopstick is your friend here!)
Using your hands, gently pull the potato slices until they’re fanned open. Place the potatoes on the prepared baking sheet.
Ina small bowl combine the olive oil, pepper, paprika, and salt.
Brush the oil over the potatoes.
Bake uncovered for 35-40minutes, or until cooked through and crispy.
Increase oven to 425 degrees.
Divide the cheese between the potatoes, trying to get them in between the slices.
Bake for 10-15 minutes, or until golden brown and bubbly.
Top with bacon, onion slices, sour cream, and dried parsley.
Serve immediately.