<human>:  How do you make a custard pie?
<bot>: To make a custard pie, start by preheating your oven to 350 degrees Fahrenheit. Prepare a 9-inch pie crust, either store-bought or homemade. Meanwhile, mix together 4 eggs, 2 cups of milk, 1/2 cup of sugar, and 1 teaspoon of vanilla extract in a bowl. Pour the mixture into the pie crust, and bake in the preheated oven for 40 minutes. Allow to cool before serving. Enjoy!