Sweet Potato Quiche

Instructions

1. Prepare the pie dough as directed. Fit it into a deep, 9-inch pie dish and refrigerate until ready to bake.
2. Wash and peel the sweet potatoes, then cut them into 1/4-inch cubes. Toss the pieces with 1 1/2 tablespoons olive oil and 1/2 teaspoon kosher salt. Spread on a baking sheet in a single layer, then roast at 400 degrees F until soft, about 20 minutes. Set aside. Reduce oven temperature to 350 degrees.
3. In a large skillet, heat the remaining 1/2 tablespoon olive oil over medium. Add the sliced onions and cook, stirring occasionally, until soft and golden, about 20 minutes. Set aside.
4. Remove the dough from the refrigerator and place it on a well-floured surface. Working from the center, roll the dough into a 12-inch circle, then transfer it to an ungreased 9″ pie dish. With a fork, pierce rows of holes in the bottom and sides of the dough, about 1 inch apart. Place the pan in a 350 degree F oven and bake until the crust is lightly golden, 10 to 15 minutes. If you will be baking the quiche right away, increase the oven temperature to 375 degrees F.
5. Layer the sweet potatoes in the bottom of the par-baked crust, then sprinkle the caramelized onions, goat cheese, and rosemary over the top. (At this point, the crust and toppings may be covered and refrigerated together for up to 24 hours.) When ready to bake, in a large bowl, whisk together the eggs, milk, nutmeg, and remaining 1/4 teaspoon kosher salt. Pour the egg mixture over the quiche, then carefully place the quiche on a large baking sheet.
6. Bake at 375 degrees F for 45 to 55 minutes, until the quiche puffs up and just barely jiggles. Remove from the oven and let sit 10 minutes. Serve warm or at room temperature.