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Savory Sweet Potato Gratin
by November-25-2015
Ingredients
  • 1 stick (1/2 cup) butter
  • 1 large or two small yellow onions, halved and sliced
  • 3 lbs. sweet potatoes, peeled and sliced into thin discs (less than 1/4 of an inch)
  • 1 tbs. ground sage
  • 1 tsp. dried thyme
  • 1 tsp. whole grain mustard
  • 1/2 tsp. paprika
  • 1/2 tsp. chipotle powder
  • 1/2 tsp. garlic powder
  • Salt and pepper
  • 1 1/4 cup heavy cream
  • 3/4 cup Pankco breadcrumbs
  • 1 cup grated Jarlsberg, Gruyere or White Cheddar Cheese
  • 1/4 cup grated Parmesan
Instructions
Preheat your oven to 350° and butter an oval gratin dish (or 9 x 13 rectangle). Melt 2 tbs. butter in a skilled over medium heat and add the onions. Season them with salt and pepper and caramelize them, stirring frequent for 20-30 minutes, until browned and sweetly fragrant, not burned. While your onions cook, layer half the sweet potato slices in your gratin dish. You may need to make more than one layer to use half the sweet potato slices. Season with salt and pepper. Set aside. After the onions have caramelized, add the sage, thyme, mustard, paprika, chipotle powder, garlic and cream. Season with salt and pepper and bring to a simmer. Stir until the cream is thickened, just a few minutes. Remove from heat. Using a slotted spoon, remove the onions from the cream sauce and spread the onions evenly over the sweet potato layer. Once all the onions are in your dish, layer the remaining half of sweet potatoes on top. Season with salt and pepper and pour the cream sauce evenly over the whole gratin. The cream will not fill the dish, just spread it around as much as you can - don't worry. Cover the dish with foil and bake for 15 minutes. Remove the foil and return to the oven for another 15 minutes. Meanwhile, assemble the topping. Melt 2 tbs. of butter, set aside. In another bowl, combine the Panko, grated cheeses and salt and pepper. Pour the butter over the bread crumbs and cheese and toss to combine. Remove the gratin from the oven and sprinkle the topping evenly over the top. Return the gratin to the oven, uncovered, for another 15 minutes, until topping is golden brown and crispy.
Details
Prep time: Cook time: Total time: Yield: Serves 8-12