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1
Bake pie crust according to recipe (if homemade) or directions on package (if purchased).
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2
Let cool completely.
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3
Set oven to 350 degrees.
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4
Bring water to a boil in a medium pot.
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5
Mix 1 1/2 cups granulated sugar, salt, flour, cornstarch, lemon zest and lemon juice in a bowl.
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6
Remove water from heat, then stir sugar mixture into the water.
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7
Beat egg yolks in another bowl, then slowly stir them into the pot along with the butter.
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8
Place over low heat.
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9
Cook, stirring, until mixture thickens enough to coat the back of a wooden spoon, about 20 minutes.
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10
Remove from heat and let cool to room temperature.
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11
Beat cream cheese and powdered sugar, then spread over the bottom of the pie crust.
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12
Top with cooled lemon filling.
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13
In a mixing bowl, beat egg whites until soft peaks form.
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14
Gradually beat in remaining 1/2 cup granulated sugar and vanilla.
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15
Beat until stiff peaks form.
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16
Use a spatula to spread the topping over the pie, covering the filling completely and touching the crust.
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17
With the back of a spoon, create decorative swirls.
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18
Bake until the peaks of the swirls begin to brown, about 5 to 10 minutes.
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19
Let pie cool, then chill until cold.