In a medium bowl beat milk, sugar and eggs together,
place mixture in medium saucepan and heat on medium,
stirring until it simmers (tiny bubbles around the edges)
Remove from heat and place saucepan over an ice water bath to cool the eggnog, or allow it to come to room temperature, then place in refrigerator until it's chilled.
Pour eggnog into 2 glasses,
add a shot or two of Fireball Cinnamon Whisky.
Top with nutmeg.
Notes
If you prefer thin eggnog and don't want it thick and custard-like, don't cook it. Just beat the milk, sugar, and egg and pour it into the glasses, add the fireball (or brandy or rum) and top with nutmeg.