4 large eggs
2 tablespoons apple cider vinegar
1 ½ cups sugar
1 stick unsalted butter, melted
½ teaspoon cinnamon
1 teaspoon vanilla
1 pinch salt
1 (9-inch) pie crust
Preheat oven to 425°F.
Beat eggs, vinegar, sugar, melted butter, cinnamon, vanilla, and salt until well combined and slightly thickened.
Pour batter into pie crust and bake for 25 minutes. Center should be set. Cool before serving.