Separate the eggs, put the whites in a clean container and freeze
Combine the yolks and sugar and blend
Add the remaining ingredients and blend
Transfer to a ½ - 1 gallon glass jar and tightly seal the lid. Place in the refrigerator for at least 1 week and up to 3 weeks.
The night before serving, put the egg whites into the refrigerator to thaw.
Before serving, set the egg whites on the counter at least 30 minutes.
Whip egg whites in a glass bowl until stiff peaks. Put in the punch bowl.
Beat the heavy cream in the glass bowl and whip to soft peaks. Put in the punch bowl.
Stir the eggnog base with a spatula, then add to the punch bowl and gently combine. Garnish with nutmeg.