Bake potatoes at 400 °F, for about an hour. Spoon out the inside (you can use it for gnocchi, mashed potatoes or dumplings filled with potatoes). Place skins on a baking sheet.
Dice scallions and set aside. Slice bacon into small pieces and cook on a frying pan until crispy.
Fill each potato skin with bacon and shredded cheese. Bake at 400 °F for 10 minutes and remove from the oven.
Top each one with scallions and a dollop of sour cream.