In a medium saucepan on low heat, bring the milk, cream, cloves, and cinnamon, to barely boiling.
In a heat-safe bowl, whisk the 4 egg yolks and 1/3 cup of sugar until light in colour and the sugar is fully incorporated.
Slowly pour the hot milk into the egg yolk mixture, stirring constantly. (Hand mixer on low is fine for this).
Pour the mixture into the saucepan. Raise the heat to medium-low, and stir constantly. Do not allow this mixture to boil - it should be around 160-170F. Cook for 3-5 minutes, or until thick.
Pour through a strainer into your temperature-safe bowl. This will catch the cloves, and any egg that became solid during the tempering process.
Stir in the alcohol, vanilla, and nutmeg.
Refrigerate 8 hours (overnight) before serving.
OPTIONAL
Before serving, beat the egg whites to soft peaks. Slowly add the 1 tbsp of sugar and keep beating until stiff peaks form.
Whisk the egg whites into the chilled mixture.