Prep the Oven: Preheat your oven to 350°F (175°C). Grease a 9.5-inch pie plate lightly with butter or non-stick spray.
The 30-Second Blend: Place the melted butter, eggs, sugar, salt, milk, vanilla, and flour into a blender or food processor.
Mix it Up: Blend for exactly 30 seconds. You want it completely smooth and well-incorporated.
The Pour: Pour the liquid mixture directly into your prepared pie plate. Don’t worry if it looks very thin—that’s exactly how it should look!
The Garnish: Sprinkle a generous dusting of nutmeg over the top.
Bake to Perfection: Place in the middle rack of the oven and bake for 45 minutes. The pie is done when the center is set but still has a very slight jiggle, and the edges are golden brown.