Place potatoes in a pot of salted boiling water, and simmer for 15 min. Preheat oven to 450F. Drain potatoes and place on a baking tray sprayed with cooking spray. Let the potatoes cool enough to handle and then squish them down with the heel of your hand using a clean dish towel if you like. Drizzle with olive oil and season with salt and pepper. Bake for 15 min. or until crispy.

Meanwhile take a pepperoni stick and roll a cheddar cheese slice around the pepperoni. Slice in 1/2" slices.

Top each potato with sour cream and a pepperoni/cheese slice. Serve warm.