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1
In a food processor, combine the flour, salt and ginger; cover and pulse to blend. Add butter and shortening; cover and pulse until mixture resembles coarse crumbs.
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2
While processing, gradually add water just until moist crumbs form. Shape into a disk; wrap in plastic and refrigerate for 30 minutes or until easy to handle.
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3
Preheat oven to 425u00b0. Roll out pastry to fit a 9-in. deep-dish pie plate. Transfer to pie plate. Trim pastry to 1/2 in. beyond edge of plate; flute or press edges. Refrigerate until ready to fill.
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4
For filling, in a small saucepan, combine the coconut milk, brown sugar and cream cheese. Cook and stir until smooth. Transfer to a large bowl; cool 5 minutes. Whisk in the sweet potatoes, eggs, lemon juice, vanilla, salt and cinnamon. Pour into crust.
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5
Bake on lower oven rack for 10-15 minutes. Reduce oven setting to 325u00b0; bake until set, 40-50 minutes. Cover edges with foil during the last 15 minutes to prevent overbrowning if necessary. Cool on a wire rack. Refrigerate for at least 3 hours before topping with meringue.
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6
For meringue, combine sugar and water in a small saucepan over medium-high heat; using a pastry brush dipped in water, wash down the sides of the pan to eliminate sugar crystals. When mixture comes to a boil, stop brushing. Cook without stirring until a thermometer reads 240u00b0 (soft-ball stage).
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7
As sugar mixture cooks, preheat broiler. Beat egg whites and cream of tartar on medium speed until soft peaks form. While beating, gradually drizzle hot sugar mixture over egg whites; continue beating until stiff glossy peaks form.
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8
Place marshmallow creme in a separate large bowl; fold in a third of the egg white mixture, then fold in the remaining mixture. If necessary, beat again until stiff glossy peaks form.
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9
Spread meringue over pie; broil 4-6 in. from heat until slightly browned, 1-2 minutes. Cool on a wire rack. Store leftovers in the refrigerator.