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1
FOR THE PIE: Preheat oven to 450 degrees F.
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2
Roll out pastry to fit a 9-inch pie plate, then line the pie plate with the pastry, trimming it, but leaving a 1/2-inch overhang.
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3
Do not prick the pastry, but line it with a double layer of heavy-duty foil & bake 8 minutes. Remove foil & bake another 5 to 7 minutes or until lightly browned. Cool on a wire rack.
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4
Reduce oven heat to 350 degrees F.
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5
Meantime, in a large saucepan, combine sugar, cornstarch & salt, then gradually stir in the water & ORANGE juice until smooth.
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6
Cook & stir over medium-high heat until thickened & bubbly, then reduce heat & cook, stirring, for another 2 minutes. Remove from heat.
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7
Stir a small amount of this hot mixture into the egg yolks, then return it all to the pan, stirring constantly.
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8
Bring to a gentle boil, cooking & stirring another 2 minutes. Remove from heat.
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9
Gently stir in the LEMON juice, butter & both zests, then pour into the prepared pie shell.
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10
FOR THE MERINGUE: In a large bowl, beat egg whites & vanilla on medium speed until soft peaks form, then gradually beat in sugar, one tablespoon at a time, on high speed, until stiff peaks form.
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11
Spread this mixture over the hot filling, sealing edges to the crust.
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12
Bake for 12 to 15 minutes or until meringue is golden brown.
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13
Cool on wire rack for at least 1 hour, then refrigerate for another couple of hours before serving.