Get ready for a new holiday tradition: crispy-skinned hasselback (thin-sliced) potatoes, studded with soft, meltingly tender cloves of confit garlic (like roasted garlic, but even more delicious). These are going to be a hit.
04Arrange the potatoes in a baking dish or cast iron skillet, cut side up. Brush the potatoes all over with the garlic oil, including the bottoms (don’t try to get oil in the slits yet). Sprinkle the potatoes generously with salt and pepper. Bake the potatoes for 30 minutes.
05At this point, the layers will begin to separate. Remove the pan from the oven and brush the potatoes again with the garlic oil — you can gently open the layers slightly if they're still sticking together. Make sure to get the oil down into the space between the slices.
06Bake for another 20-30 minutes, until the potatoes are starting to crisp on the edges. Remove the pan from the oven once more and tuck four or five roasted garlic cloves between the slits of each potato (every few leaves should get one). Return to the oven and bake another 10-20 minutes until the edges are crisp and brown and the center can be easily pierced with a paring knife).