Combine all of the ingredients into a mixing glass and stir until the glass begins to cloud.
Strain into a chilled coupe glass, and garnish with a cinnamon stick.
*Spaghetti squash cordial: Add 1.5 cups of squash purée, 1 cup of granulated sugar and 1 sprig of rosemary to a heavy-bottom saucepan, and bring to a rolling simmer over medium heat, stirring slowly. Remove from the heat and let cool. Strain through fine-mesh cloth into a clean bowl, and stir in 1 cup of vodka to the mixture until combined. Use immediately or refrigerate in an airtight container for up to 1 week.