Preheat the oven to 400 degrees F (205 degrees C).

Mix together eggs, sugar, vanilla, and salt in a large bowl; stir well. Blend in scalded milk. Stir in 3 drops yellow food coloring for more color.

Brush the bottom and sides of pie crust with beaten egg white to help prevent a soggy crust. Pour custard mixture into pie crust. Sprinkle with nutmeg.

Bake in the preheated oven until a knife inserted near the center comes out clean, 30 to 35 minutes. Sprinkle toasted coconut flakes on top if using. Cool on a wire rack.