1. Preheat your oven to 350°F (175°C).
2. In a blender, combine the margarine, eggs, sugar, salt, milk, vanilla extract, and all-purpose flour. Blend until smooth.
3. Pour the mixture into a greased 9-inch pie dish.
4. Bake in the preheated oven for about 45-50 minutes, or until the custard is set and the top is lightly browned.
5. Remove from the oven and let it cool to room temperature before serving.
Slice and enjoy your delicious Magic Crust Custard Pie!
Enjoy the magic of this delicious Magic Crust Custard Pie with its velvety custard filling and enchanting crust formation!