Combine egg yolk with sugar. Stir into cool milk. Add Vanilla Bean. Heat until thick. Do not boil. Let cool, remove vanilla bean, then stir in liqueur.
Nutritional Information:
750 Calories (kcal); 29g Total Fat; (37% calories from fat); 19g Protein; 90g Carbohydrate; 884mg Cholesterol; 149mg Sodium