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Layers of mashed sweet potato, sautéed wild mushrooms and a mixture of spinach and ricotta cheese transforms this satisfying torte into a stunning and delicious main-course centerpiece.
Peel and quarter sweet potatoes. Place in large pot, cover potatoes by 1 inch with salted cold water and simmer until tender, about 20 minutes. Drain potatoes, transfer to medium bowl and, while still warm, coarsely mash. Using electric mixer, beat in butter, eggs, salt and pepper to taste until smooth.
In large skillet, heat oil over medium heat. Add leeks and cook, stirring often, until softened, about 10 minutes. Add mushrooms and garlic and cook, stirring often, until mushrooms release their liquid; allow to evaporate. Stir in thyme and season to taste with salt and freshly ground pepper. Remove pan from heat and let cool.
In medium bowl, mix ricotta cheese, spinach, egg whites, dill, red pepper flakes and 1?2 teaspoon salt until blended.
Preheat oven to 375°F. Unfold one puff pastry sheet and place on lightly floured surface. Roll out to a 14-inch square, then cut dough into a 14-inch circle. Transfer circle to ungreased 81?2 – or 9-inch springform pan and press gently to fit into bottom and side (there will be some overhang for folding over top of pie).
Spoon sweet potato mixture into pastry and pat into even layer. Spoon mushroom mixture over potatoes and spread evenly. Top with spinach mixture (filling may come slightly over top of pan). Carefully fold pastry overhang on top of the filling. Brush edges with egg wash and seal.
Unfold second puff pastry sheet on lightly floured surface. Roll out slightly, then cut into an 81?2- or 9-inch circle. Place circle of dough over top and press edges into pan to seal. Brush top with egg wash and, using a small sharp knife or razor blade, slash top in a cross-hatch pattern.
Bake 35 to 40 minutes. When well browned, loosely cover top with foil. Reduce heat to 350°F. Carefully remove side of pan and brush sides with egg wash. Bake until sides are golden, about 35 to 40 minutes. Remove from oven and let cool slightly before cutting into wedges and serving. Garnish each serving with fresh herb sprigs.
- Calories 445
- Carbohydrate Content 46 g
- Cholesterol Content 52 mg
- Fat Content 24 g
- Fiber Content 5 g
- Protein Content 14 g
- Saturated Fat Content 6 g
- Sodium Content 269 mg
- Sugar Content 0 g