1Preheat oven to 400°F. Line sheet pan(s) with parchment paper or foil.
2In a large bowl toss potatoes in the butter until well coated.
3Arrange potatoes in a single layer on the sheet pan. You may need more than one pan. Sprinkle generously with salt and pepper.
4Bake potatoes for 30 minutes or until tender, flipping once halfway through. Baking time may vary based on the size of potato rounds.
5Top potato rounds with cheese, about one heaping tablespoon per rounds. Return potatoes to the oven for 3-4 minutes until cheese is melted and bubbling.
6Add a dollop of sour cream, a few pieces of bacon, and some scallions to each potato round. Finish with a sprinkling of ground pepper.