Preheat oven to 350°F.
Roll pie crust into a circle 1⁄8” thick. Place into a 9” pie plate, gently fit into sides, then trim edges of crust to leave the desired overhang and pinch or fold crust edge as desired.
Line pie crust with parchment paper or a coffee filter, then pour in baking weights or beans.
Bake the crust for 15 minutes, then remove weights and prick the bottom of the crust with a fork before returning it to the oven for an additional 15 minutes. The crust should look pale and dry. Set aside.
In a large bowl, whisk together eggs, sugar, salt, and vanilla.
Once those are combined, drizzle in melted butter and vinegar and whisk vigorously until the mixture is frothy and even.
Pour the filling into the crust and bake for approximately 35 minutes, until the pie is set but still jiggles in the middle. The filling should puff up in the oven and brown significantly. As the pie cools, it will flatten.
Cool the pie completely before serving. Serve cold or at room temperature, topped with whipped cream and a dusting of nutmeg.