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Spritz the baking pan with cooking spray.
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Combine the flour, egg, Parmesan, and salt in a large bowl. Stir to mix until a satiny and firm dough forms.
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Arrange the dough between two grease parchment papers, then roll the dough into a ¹⁄₁₆-inch thick circle.
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Make the crust: Transfer the dough into the prepared pan and press to coat the bottom.
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Slide the baking pan into Rack Position 1, select Convection Bake, set temperature to 325ºF (163ºC) and set time to 12 minutes.
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When cooking is complete, the edges of the crust should be lightly browned.
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Meanwhile, combine the ingredient for the filling, except for the green onions in a large bowl.
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Pour the filling over the cooked crust and cover the edges of the crust with aluminum foil.
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Slide the baking pan into Rack Position 1, select Convection Bake, set time to 15 minutes.
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When cooking is complete, reduce the heat to 300ºF (150ºC) and set time to 30 minutes.
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When cooking is complete, a toothpick inserted in the center should come out clean.
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Remove from the oven and allow to cool for 10 minutes before serving.