Preheat the Oven: Begin by preheating your oven to 350°F (175°C).
Mix the Ingredients: In a large mixing bowl, combine the beaten eggs, sugar, flour, and salt. Stir until well combined.
Add Buttermilk and More: Gradually mix in the buttermilk, melted butter, and vanilla. Stir until the mixture is smooth.
Pour into Pie Shell: Carefully pour the filling into the unbaked pie shell. If desired, sprinkle nutmeg on top for an extra flavor kick.
Bake: Place the pie in the preheated oven and bake for 35-45 minutes, or until the pie is set and slightly golden on top.
Cool and Serve: Once baked, take it out of the oven and let it cool before serving. Enjoy your delightful Buttermilk Pie!