Heat the honey and butter in a small saucepan and stir until the butter is completely melted.
⅔ cup honey, ½ cup unsalted butter
In a large mixing bowl, whisk together the sugar and eggs vigorously until slightly lighter in color.
½ cup granulated sugar, 2 large eggs + 2 yolks
Stream in the slightly cooled honey mixture while whisking, then add the salt, buttermilk, vanilla, and corn meal and whisk to combine.
⅛ teaspoon kosher salt, ½ cup full-fat buttermilk, 2 teaspoons vanilla paste or extract, 1 tablespoon corn meal
Add the pie plate to a baking sheet, then pour the mixture into the cooled par-baked pie crust. Very carefully transfer the tray to the oven, careful not to slosh the filling over the sides.
Bake the pie for 40-50 minutes, moving the pie to the lower third of the oven for the final 10 minutes. Transfer to a wire rack to cool for two hours, then refrigerate (uncovered) for 6-8 hours or overnight.
Top the pie with flaky sea salt before serving. You can also add whipped cream and an extra drizzle of honey to the slices, if desired.
Flaky salt