1 1/3 cups half-and-half
1 dash ground cinnamon
1 whole clove
1 dash ground nutmeg
2 egg yolks
1/4 cup granular sucralose sweetener (such as Splenda®)
2 tablespoons canned pumpkin puree (optional)
Pour half-and-half into a microwave-safe measuring cup. Add cinnamon, clove, and nutmeg. Heat in the microwave for 1 minute. Stir. Microwave for 1 minute more.
Mix eggs yolks in a bowl using a fork; add sucralose sweetener. Add 1 teaspoon of the half-and-half mixture to the egg yolk mixture. Repeat until all half-and-half has been incorporated. Remove clove and discard. Add pumpkin puree and pour eggnog back into measuring cup.
Heat eggnog in the microwave for 30 seconds on low. Stir. Repeat heating and stirring 3 more times until slightly thickened.