In a large bowl fitted with electric mixer, combine sugar, cornmeal and flour. While on low, add eggs one at a time. Mix on medium until mixture is pale yellow and slightly foamy.
Add melted butter, lemon juice, and milk. Continue to blend until well combined.
Fold in lemon zest. Divide mixture between two prepared pie pans filled with your pie dough.
Bake for 45 minutes or until top is lightly golden and crust begins to brown. You can wrap crusts in aluminum foil halfway through baking to prevent crust from over cooking.
Cool the baked pie at room temperature on a wire rack for about 1 to 2 hours. Cover tightly with foil and refrigerate for several hours.
When ready to serve, dust the top of the pie with powdered sugar before serving! Optional: Garnish with a mint sprig and slice of lemon.
Notes
NOTE: You can use a frozen pie crust, just be sure to allow it to thaw to room temperature before baking.