In a saucepan, combine the heavy cream, milk, and sugar. Place over medium heat and stir occasionally until the sugar has dissolved and the mixture is warm.

In a small bowl, whisk the cornstarch with a tablespoon of water until smooth.

Add the cornstarch mixture to the warm cream mixture, stirring constantly. Continue to cook for 2-3 minutes until the mixture thickens to a creamy consistency.

Remove from heat and stir in the vanilla extract and a pinch of salt.

Let the mixture cool slightly, then pour into serving bowls or glasses.

Refrigerate for at least 1 hour to allow the mixture to set and chill.

Before serving, garnish with grated white chocolate and fresh berries if desired.