Ingredients:
2 medium sweet potatoes
1 refrigerated pie crust
4 tablespoons unsalted butter, melted
1 1/2 tablespoons lemon juice
1/2 teaspoon nutmeg
1/2 teaspoon cinnamon
1/2 teaspoon salt
3 large eggs, separated
1/2 cup granulated sugar
2 tablespoons packed light brown sugar
2 tablespoons all-purpose flour
3/4 cup buttermilk
