Add 1 cup of the milk to a medium saucepan. Add cinnamon sticks and bring to a simmer over medium heat.

Meanwhile, in a small bowl, whisk together the cornstarch and sugar. Whisk the remaining milk into the cornstarch mixture.

When the milk in the pan begins to simmer, pour the cornstarch mixture into the saucepan in a thin steady stream, whisking constantly. Continue to whisk vigorously and increase heat just a bit to bring the mixture to a gentle boil.

Allow the mixture to boil for about about 30 seconds, whisking constantly, until thickened. Remove from heat and remove the cinnamon sticks. Stir in the pinch of cinnamon and the vanilla.

Pour the mixture into individual dessert dishes. Refrigerate for at least 3 hours, or until set. Serve with jam, fresh fruit, chocolate sauce or chocolate shavings.