In a large deep pan, whisk together eggs, sugar and salt while gradually adding in 4 cups of whole milk
Stir mixture over a low heat until thermometer reaches 160 degrees, do NOT allow it to come to a boil though (important)
Once it reaches 160 degrees, Immediately transfer the mixture into a large bowl.
Stir in the vanilla, nutmeg and leftover whole milk.
Next you put the bowl in an ice water bath, gently mixing until it is cool, then refrigerate for 2 1/2 hours, covered.
When ready to serve, beat the heavy cream until soft peaks start to form then gently mix it into the cold eggnog mixture.
Sprinkle with nutmeg if desired
ENJOY!