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Two-Potato Gratin - Sweet potatoes, Yukon Golds & Gruyere cheese come together to create this delectable dish. Simply Sated
4.67 from 3 votes
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Two-Potato Gratin

The best of two potato worlds - sweet & Yukon Gold in one unforgettable gratin. Recipe adapted from: http://www.myrecipes.com/recipe/two-potato-gratin-2
Course Side - Potatoes
Prep Time 15 minutes
Cook Time 1 hour
Total Time 1 hour 15 minutes
Servings 6 -8
Author Susie Gall

Ingredients

  • ½ sweet yellow onion diced
  • 1- tablespoon butter
  • 1- tablespoon olive oil
  • cups heavy cream
  • 2 tablespoons chopped parsley
  • 1- tablespoon fresh chives chopped or 1 teaspoon dried chives
  • ½ teaspoon fresh rosemary chopped or ¼ teaspoon dried rosemary, chopped
  • ½ teaspoon ground black or white pepper
  • ¼ teaspoon Kosher salt
  • 1/8 teaspoon freshly grated nutmeg or dried ground nutmeg
  • pounds 4-5 medium Yukon Gold potatoes, peeled & thinly sliced
  • pounds 3-4 sweet potatoes, peeled & thinly sliced
  • 2 cups milks – any type of milk is fine it will be discarded
  • cups 6 ounces Gruyere Cheese (high-quality), shredded
  • ½ cup grated Parmesan cheese

Instructions

  1. Preheat oven to 375F.
  2. Spray a 2-quart casserole dish with cooking spray.
  3. In a medium saucepan over medium heat, sauté onions in 1 tablespoon butter and 1 tablespoon olive oil until translucent. Stir in cream, parsley, chives, rosemary, pepper, salt and nutmeg. Cook 2 minutes, stirring continuously. Remove from heat and set aside to cool.
  4. While cream mixture cools, combine sliced potatoes and milk in a large, microwave-safe bowl and cover with plastic wrap. Microwave at HIGH for 5 minutes, uncover and stir potatoes. Cover & microwave 5 more minutes. Drain potatoes & discard milk.
  5. Layer one-third potatoes, alternating between Yukon and Sweet, in the prepared dish.
  6. Pour 1/3 of cream mixture over potato layer and sprinkle with ½ cup Gruyere and 2 tablespoons Parmesan cheeses. Repeat layering the potatoes and cheeses twice. The final layer will be Parmesan cheese.
  7. If desired, dot 1 tablespoon butter into small pieces over the top.
  8. Cover with foil.
  9. Bake at 375F for 30 minutes. Uncover and bake 20-30 minutes more or until browned.
  10. Remove from oven and let set for 10 minutes before serving.
  11. Enjoy!