Preheat oven to 350 F. Lay 2 overlapping pieces of aluminum foil on a large baking sheet.
Prick each potato all over with a fork.
Place the mini potatoes in a bowl, drizzle with olive oil, and toss to coat. Season with salt and pepper
Place potatoes on the foil lined baking sheet. Pull the long ends of the foil up over the potatoes. Hold together and roll down to form a tube over the potatoes.
Fold in both ends of the foil tube, forming a sealed packet.
Bake for 45 minutes.
Remove pan from the oven, turn the oven heat up to 425 F.
Carefully unfold the foil packet, spread the potatoes out evenly over the foil lined baking sheet, return to the oven.
Bake for 15-20 minutes, until crispy on the outside and fork-tender.Note: Smaller potatoes may need to be removed from the pan earlier, as they will cook faster than larger potatoes. Allow cooked potatoes to cool slightly, before cutting the top ¼-1/3 or so off the top of each potato.
Use a melon baller or small metal measuring spoon to scoop most of the flesh from the center of each potato, placing the loose potato in the bowl of a mini food processor, and the skins back on the baking pan.
Once all of the potatoes have been scooped out, add butter, sour cream, and shredded cheese to the scooped potato flesh, blitz until smooth. Add the green onions / chives and bacon, blitz once more to combine and process the bacon down. Season the cheesy potato filling with salt and pepper, to taste.
Using a small spoon or pastry bag, fill the scooped potato skins with the cheesy potato filling.
Bake for 15 more minutes, or until heated through.
To serve, arrange hot mini baked potatoes on a serving dish. Top with a dab of sour cream, sprinkle additional bacon and/or chives on top.
Serve immediately.