Combine sugar, cornstarch, and cinnamon sticks in medium saucepan. Gradually stir in evaporated milk. Cook over medium heat, stirring constantly, until mixture comes to a boil and slightly thickens. Remove from heat. Remove cinnamon sticks; stir in vanilla. Refrigerate for two hours or until well chilled. Arrange fruit in dessert dishes and top with sauce. Sprinkle with cinnamon, if desired. Refrigerate leftover sauce in a covered container for up to four days.