PREHEAT THE OVEN - Set your oven to 350°F (175°C) to ensure an even bake.
Wash and peel your potatoes (optional).
Slice them into ¼-inch rounds—a mandoline slicer makes this easy!
Toss the potato slices with salt and pepper in a large bowl.
In a saucepan over medium-low heat, combine the heavy cream and Boursin cheese.
Stir continuously until the cheese melts into the cream, forming a smooth and velvety sauce.
Grease a deep baking dish with butter.
Arrange a layer of potato slices in the dish.
Pour some of the Boursin cream sauce over the potatoes.
Repeat the layering process until all the potatoes and sauce are used.
Cover the dish with foil and bake for 1 hour.
Remove the foil and bake for an additional 15 minutes to get a golden, slightly crispy top.
Let the dish cool for a few minutes before serving.
Sprinkle with chopped fresh parsley or chives for a pop of color and freshness.