Instructions
Begin by preheating your oven to 400°F (200°C). Lightly grease an 8x8-inch square baking dish with nonstick cooking spray to ensure your potatoes don't stick and the edges crisp beautifully.
Take 5 heads of garlic and with a sharp knife, carefully slice off the tops to expose the individual cloves. Arrange the cut-side up on a large piece of foil, then generously drizzle with olive oil and sprinkle with kosher salt to enhance the caramelization as they roast. Fold the foil tightly around the garlic heads to seal in the moisture, then place this packet on a baking sheet. Roast in your preheated oven for about 45 minutes, until the cloves become soft and deliciously caramelized. Once done, remove and let the garlic rest for 15 minutes so it's cool enough to handle.
Carefully unwrap the foil and squeeze the softened garlic cloves into the cup of an upright blender. Add 1½ cups half-and-half, ¾ cup heavy cream, and 4 ounces cream cheese for a rich, velvety base. Next, incorporate ½ cup shredded Gruyère, ½ cup shredded white cheddar, 2 tablespoons grated Parmesan, and ½ teaspoon kosher salt. Blend everything until the sauce is perfectly smooth and creamy.
Slice 3 pounds of Yukon Gold potatoes into even, thin rounds. Neatly arrange the slices in overlapping rows within your prepared baking dish. Gently pour the luscious garlic-cheese sauce over the potatoes, making sure to fill every crevice between slices for full flavor coverage.
Sprinkle the remaining ½ cup shredded Gruyère, ½ cup cheddar, and 2 tablespoons Parmesan evenly on top. Add 1 teaspoon fresh thyme leaves and a few grinds of freshly ground black pepper to bring out herbal and spicy notes.
Cover the dish tightly with foil to trap steam and bake in the oven for 40 minutes. Then, remove the foil and continue baking for another 15-20 minutes, or until your potatoes are tender and the cheese topping is golden and bubbling.
Allow the dish to cool slightly for 5 minutes to set before garnishing with a sprinkle of minced fresh chives. This adds a lovely color contrast and burst of fresh flavor.
Pro tip: Use a mandoline slicer for uniform potato slices to ensure even cooking, and be generous with the garlic—roasting the bulbs softens their bite and infuses the dish with heavenly aroma. Serve alongside roasted chicken or a festive holiday spread for a comforting crowd-pleaser. Enjoy your creamy, garlicky delight!
