Buttermilk Chess Pie

Buttermilk Chess Pie
Ingredients

1/2 cup unsalted butter
1/2 cup granulated sugar
1/4 teaspoon salt
3 tablespoon All purpose flour
3 eggs
1 teaspoon vanilla extract
1/8 teaspoon nutmeg
1 lemon Zest
1 lemon juice
1 cup buttermilk
9 inch pie crest