Sweet Potato Chess Pie | Food Stuff

Ingredients

• 1 tablespoon apple cider vinegar
• 1/2 cup buttermilk
• 2 tablespoons fine cornmeal
• 4 large eggs
• 1 1/4 cups all-purpose flour, plus more for dusting
• 1 tablespoon granulated sugar
• 1 1/4 cups granulated sugar
• Finely grated zest and juice of 1 lemon (preferably Meyer lemon)
• 1/4 cup packed light brown sugar
• 1/2 teaspoon salt
• 2 medium sweet potatoes (about 1 pound)
• 6 tablespoons cold unsalted butter, cut into small pieces
• 6 tablespoons unsalted butter, melted and cooled
• 1 teaspoon pure vanilla extract
• 4 tablespoons cold vegetable shortening