Custard Pie - for the clowns in your life

I live in a household that loves custard. To eat, that is, not to throw in someone's face - we're not clowns. But that was part of the inspiration: how does one make a custard pie worthy of throwing in someone's face that would be welcomed by the receiver. I don't know if I got it right, but we sure like this version.

1 recipe blind-baked Cookie Pie Crust, completely cooled
1 cup heavy cream
1 cup milk

1 tsp vanilla
¼ tsp nutmeg

¼ cup (2oz/58gr) butter 
⅓ cup sugar
3 egg yolks
1 egg

1. Heat the oven to 325°F.
2. Bring the cream and milk to a very slow boil in a saucepan.
3. Remove from the heat and add the vanilla and the nutmeg. 
4. Cut the butter into small chunks and slowly whisk them into the hot dairy until it all dissolves. This part is important to do thoroughly otherwise the butter will separate and rise to the top as the pie bakes creating a weird crust.
5. In a bowl, whisk together the yolk and sugar until the yolk turns a pale yellow. Whisk in the extra whole egg.
6. Very slowly whisk the flavored dairy into the egg mixture. Do this slowly; this is to gradually increase the temperature of the egg and avoid making scrambled eggs with the hot liquid.
7. Strain the mixture into the baked tart shell.
8. Bake about 35 to 40 minutes or until set. The pie will puff up a bit when it is cooked, and will settle again as it cools.
9. Let it cool completely, which can take several hours.
10. Delicious accompanied by a fresh sprig of currants or other tart fruit.