Sweet Potato Gratin with Caramelized Onions

Sweet Potato Gratin with Caramelized Onions
Photo by Scott Phillips

Ingredients

  • 1/8 tsp. cayenne
  • 2 Tbs. freshly grated Parmigiano-Reggiano
  • ½ tsp. kosher salt; more to taste
  • 2 cups heavy cream
  • 1 cup (4 oz.) pecan halves, toasted
  • 2 oz. (4 Tbs.) unsalted butter; more for the baking dish
  • 4 lb. sweet potatoes (about 5 medium)
  • + 5 more ingredients
    • 2 Tbs. fresh breadcrumbs
    • ½ Tbs. freshly grated orange zest (from 1 orange)
    • 2 lb. yellow onions, thinly sliced (about 6 cups)
    • ½ tsp. freshly ground black pepper, more to taste
    • 3 sprigs fresh thyme

Heat the butter in a heavy-based 12-inch skillet over medium heat until it begins to foam. Add the onions, reduce the heat to medium low, and cook slowly, stirring occasionally, until the onions are soft and nicely browned, 30 to 40 minutes. Season with the 1/2 tsp. each salt and pepper. Remove f...

View full recipe at Fine Cooking

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