1 can of condensed milk, 1 1/2 cups of liquid milk, 3 egg yolks, 1 tsp of cornstarch, 1 cup of rum, half a lemon peel, cinnamon, nutmeg. Preparation is quite easy! In a saucepan place the condensed milk, liquid milk, lemon peel, cloves and cinnamon, stir and heat without letting it boil. In a small bowl place the egg yolks and add the teaspoon of cornstarch and mix well. When the milk is hot, add a cup of this mixture to the yolks with the cornstarch and mix quickly, this process is known as tempering the yolks. Add that mixture of eggs and milk to the rest of the milk and continue cooking over medium heat and stirring constantly until the mixture thickens. Remove from the heat and let it cool for a few minutes. Strain the preparation to discard all the spices. Add the rum and stir; taste the desired amount of liqueur. Allow to cool and bottle in glass bottles. Serve chilled and enjoy!