1. In a medium saucepan beat egg yolks and sugar.
2. Slowly beat in 2 cups of the milk.
3. Cook over medium heat, stirring frequently, until themometer registers 160 degrees or mixture coats back of a metal spoon.
4. Remove from heat; strain into a pitcher.
5. Stiri in remaining milk, bourbon, vanilla and nutmeg.
6. Cover and chill at least 8 hours.
7. When served sprinkle with additional nutmeg.