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Two-Potato Gratin

  • 8servings
  • 218calories

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Source: www.myrecipes.comReport recipe

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Nutrition Info . . .

NutrientsProteins, Lipids, Cellulose
VitaminsA, B2, B3, B9, B12
MineralsNatrium, Chromium, Calcium, Potassium, Phosphorus, Cobalt, Molybdenum

Ingredients Jump to Instructions ↓

  1. 2 medium baking potatoes, peeled and cut into 1/4-inch-thick slices (about 3 cups)

  2. 2 medium sweet potatoes, peeled and cut into 1/4-inch-thick slices (about 4 cups)

  3. 2 quarts no-salt-added chicken stock (such as Swanson)

  4. 2 tablespoons canola oil

  5. 3 tablespoons all-purpose flour

  6. 2 garlic cloves, crushed

  7. 1 1/2 cups 2% reduced-fat milk

  8. 2 thyme sprigs

  9. 3/4 teaspoon kosher salt, divided

  10. 1/4 teaspoon freshly ground black pepper

  11. 3 ounces aged Gruyere cheese, shredded (about 3/4 cup)

  12. Cooking spray

  13. 2 tablespoons chopped fresh chives, divided

  14. 1 1/2 teaspoons chopped fresh thyme

  15. 1 ounce fresh Parmigiano-Reggiano cheese, grated (about 1/4 cup)

Instructions Jump to Ingredients ↑

  1. Preheat oven to 350°.

  2. Place potatoes in a large stockpot; cover with stock. Bring mixture to a boil; cook 4 minutes. Remove from heat. Carefully remove potatoes from pot using a slotted spoon, reserving cooking liquid. Arrange potato slices in a single layer on a jelly-roll pan; set aside. Strain cooking liquid through a fine-mesh sieve over a bowl; reserve 1 cup cooking liquid. Discard solids and remaining cooking liquid.

  3. Heat a medium saucepan over medium heat. Add oil to pan. Sprinkle flour over oil; cook 1 minute, stirring constantly with a whisk. Add garlic; cook 2 minutes, stirring frequently. Combine milk and reserved 1 cup cooking liquid. Gradually pour milk mixture into flour mixture in pan, stirring constantly with a whisk. Add thyme sprigs to pan. Bring mixture to a boil; cook 4 minutes or until slightly thick, stirring frequently. Remove from heat. Strain mixture through a fine-mesh sieve over a bowl, reserving sauce; discard solids. Stir 1/2 teaspoon salt, pepper, and Gruyère cheese into sauce.

  4. Spread 1/2 cup sauce in bottom of a broiler-safe 2-quart ceramic baking dish coated with cooking spray. Arrange a single, flat layer of sweet potato and then baking potato slices over sauce. Over flat layer, alternate baking potato and sweet potato slices, in shingle-like fashion. Sprinkle evenly with remaining 1/4 teaspoon salt, 1 tablespoon chives, and chopped thyme; pour remaining sauce over potato mixture. Sprinkle with Parmigiano-Reggiano cheese. Bake at 350° for 1 hour or until potatoes are tender when pierced with a knife.

  5. Remove gratin from oven. Preheat broiler to high.

  6. Place gratin in oven. Broil gratin 3 minutes or until browned. Sprinkle with remaining 1 tablespoon chives.

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