From David Lebovitz
Garnish: nutmeg
In a blender, mix the eggs and sugar, until combined.
Add the tequila, sherry, milk, cream, and salt. Blend until smooth.
Chill the eggnog mixture thoroughly (preferably overnight), until ready to serve.
The eggnog should be served well-chilled, in chilled glasses, if possible. Dust each serving with a small amount of freshly grated nutmeg. The eggnog can be kept for up to 5 days in the refrigerator.