Ingredients

  • 3 heads garlic cloves, separated, not peeled
  • 1 tablespoon olive oil
  • 1 quart half-and-half
  • 1 tablespoon chopped thyme
  • 1 teaspoon chopped rosemary
  • salt
  • pepper
  • 5 lbs yukon gold potatoes (peeled and very thinly sliced)
  • 9 ounces aged manchego cheese, coarsely shredded (2 cups)
  • 1 cup smoked gouda cheese, shredded (or San Simon cheese)

Method

  • Preheat the oven to 357 degrees. In a cake pan, drizzle garlic with oil. Cover with foil and roast for 40 minutes, until tender. Let cool, then squeeze out cloves. Mash the garlic to a paste and transfer to saucepan.
  • Add half-and-half, thyme, and rosemary. Bring to a boil and simmer over very low heat until reduced to 3 cups, approximately 20 minutes; season with salt and pepper.
  • Arrange 1/4 of the potatoes in the bottom of a 9x13 baking dish. Top with 1/4 of the grated cheeses and drizzle lightly with the garlic cream.
  • Repeat layering in the same way with the rest of the ingredients. Pour any remaining cream on top and press top layer of potatoes to submerge.
  • Bake gratin for about 1-1/2 hours, until golden and bubbling. Let cool twenty minutes before cutting into squares and serving.