01 - Preheat oven to 400°F (200°C). Scrub the potatoes and pierce each several times with a fork. Arrange directly on the oven rack and bake until tender, about 45 minutes.
02 - Remove the potatoes from the oven and allow to cool slightly. Halve each potato lengthwise and carefully scoop out most of the flesh, leaving a 1/4-inch shell. Set the removed flesh aside for another use.
03 - Brush both sides of the potato skins with olive oil. Place shells cut-side down on a baking sheet. Bake for 5 minutes, then flip and continue baking for 5 more minutes to achieve crispness.
04 - In a small saucepan over medium heat, melt butter. Add minced garlic and sauté until aromatic, about 1 minute. Pour in the cream, season with pepper and salt, and bring to a gentle simmer. Stir in Parmesan cheese until melted and the sauce is smooth. Remove from heat.
05 - Spoon 1-2 tablespoons of Alfredo sauce into each potato skin. Evenly scatter mozzarella cheese and crumbled bacon on top.
06 - Return the filled potato skins to the oven and bake for 8–10 minutes, until the cheese has melted and is bubbling.
07 - Remove from the oven and sprinkle with fresh chives. Serve immediately while hot.