INGREDIENTS
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1 package pie crust (not in a shell)
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4 cups berries (we used equal parts blueberries, raspberries, blackberries and quartered strawberries)
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Zest and juice of 1 lemon
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1/2 teaspoon pure vanilla extract
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1/2 cup sugar
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2 tablespoons cornstarch
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Pinch of salt
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1 egg
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2 tablespoons turbinado (raw) sugar