Ingredients

  • 3 tablespoons butter
  • 2 lbs russet potatoes, peeled, sliced 1/8-inch thick (about 4 medium-sized potatoes)
  • 1 large yellow onions or 1 large white onion, thinly sliced
  • 2 tablespoons chopped fresh parsley
  • 1 tablespoon chopped fresh chives (optional)
  • 2 thick slices bacon, cooked and chopped
  • 2 1/2 cups gruyere cheese, grated
  • 1/2 cup parmesan cheese, grated
  • 3 cups half-and-half
  • salt, to taste
  • fresh ground pepper, to taste

Method

  • Preheat oven to 350°F; butter a large casserole dish with 1 1/2 Tbsp of butter. If you use a casserole dish that is about 9x13, you'll have more surface area, more of the potatoes will brown, and the cooking time will be faster.
  • Layer the bottom of the casserole dish with 1/3 of the potato slices.
  • Sprinkle with salt and pepper.
  • Layer on 1/2 of the sliced onions and 1/2 cup of the Gruyere cheese.
  • Layer on 1/2 of the bacon, 1/2 of the parsley and chives.
  • Sprinkle with a little Parmesan.
  • Repeat by layering on 1/3 of the potato slices, sprinkle again with salt and pepper.
  • Layer on the remaining sliced onions, 1/2 cup of the Gruyere cheese, the remaining bacon, parsley and chives.
  • Sprinkle with a little Parmesan.
  • Top the casserole with the remaining potato slices. Add the half and half. Dot the potatoes with the remaining 1 1/2 Tbsp of butter.
  • Cover the casserole with aluminum foil and bake in the oven for one hour. After an hour, remove from the oven, remove the foil, sprinkle on the remaining cheese.
  • Return to the oven for an additional 30-40 minutes.
  • When done, the potatoes should be tender, but not mushy, and the liquid should be mostly absorbed.
  • Note: For a faster cooking time, you can parboil the sliced potatoes for 8 minutes first, patting them dry, before layering them in the casserole pan. In this case the total oven cooking time is about 35-45 minutes.