Preheat your oven to 350°F (175°C) and move one of the racks to the lowest setting.
Line a 9-inch shallow pie plate with the refrigerated pie crust, crimping the edges.
In a medium bowl, whisk together the sugar, cornmeal, flour, and salt until well mixed.
In a small bowl, beat the eggs, whisk in the melted butter, and evaporated milk.
Zest one lemon before cutting all three in half and squeezing the juice into a separate bowl.
Pour the juice through a fine sieve to remove any seeds and pulp. Then, add the zest and juice to the egg mixture.
Pour the entire mixture into the bowl containing the sugar mix and stir well.
Pour the mixture into the pie shell and bake in the oven.
Bake for 35 to 45 minutes until the top is golden brown and the center jiggles slightly.
Cool for at least 30 minutes before slicing and serving.