Orange Buttermilk Chess Pie

Pie Crust

• 1 homemade pie crust, chilled (9 in.)
  或 1 pie crust, store bought, chilled (9 in.)

Filling

• 2 oranges, thin peel only, no pith, divided, plus 2 tbsp juice
• 7 oz sugar
• 2 oz yellow cornmeal
• 1 vanilla bean, cut into pieces
• 1 oz unsalted butter, chilled, cut into pieces (½ in.)
• 3 oz buttermilk
• 4 large eggs
• ¼ tsp salt
• confectioners sugar, to garnish