Add sugar, cornstarch and salt to a medium saucepan and stir to blend. Whisk in milk and cream. Bring to a boil over medium heat, stirring constantly. Once it boils, reduce heat to low and continue to stir for an additional two minutes. It will be thick at this point.
Remove from heat. Stir in white chocolate and vanilla. Spoon into dessert dishes. Cover in plastic wrap and place in the fridge for at least an hour.
When ready to serve, remove plastic wrap and top with sliced strawberries and whipped cream.