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1
Cut a thin sliver off of the bottom of each apple so that they sit flat.
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2
Heat oven to 425 degrees.
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3
Mix 3 tablespoons butter, 1/2 cup brown sugar, 1 teaspoon cinnamon, and all the nuts in a small bowl.
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4
Spoon a portion of the mixture into each hallowed-out apple.
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5
For boxed pie crust, unroll one of the dough sheets onto a floured work surface.
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6
Pulling on side of dough to straighten rounded edges, roll it into an approximate 12-inch square.
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7
Then cut the dough into four 6-inch squares.
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8
Brush the edge of each square with egg white.
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9
Set an apple half on each square.
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10
Bring up the dough's 4 corners around the apple and pinch edges to seal.
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11
Place on a large (at least 12-by-18-inch) parchment-covered baking dish.
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12
Brush dumpling tops and sides with egg whites.
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13
Sprinkle with sugar.
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14
Repeat the process with remaining apples and dough.
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15
Bake dumplings until pastry sets and starts to turn golden, about 10 minutes.
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16
Reduce heat to 375 and bake until golden-brown, about 20 minutes longer.
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17
While apples bake, bring 1 cup water, the remaining 2 tablespoons butter, 1/2 cup brown sugar and 1 teaspoon cinnamon to boil in a small saucepan over medium heat.
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18
Dissolve cornstarch in 2 teaspoons water; whisk into hot syrup for a smooth sauce.
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19
Cover, keep warm.
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20
For each serving, spoon a portion of sauce on a dessert plate.
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21
Set apple dumpling over warm sauce, and serve immediately.
