In a saucepan over med-high, heat the milk, cream and vanilla until they are just about to boil, but not quite.
While this is heating, in a bowl whisk together the egg yolks and cornflour.
Continue to whisk the eggs as you slowly add the milk mixture, then return to saucepan and stir continuously over a low heat until thickens. This should take 2-3 minutes.
Serve over cooked apples.
To make the apple puree, just peel the apples, roughly chop and boil covered in water until soft.
Reserve the liquid and serve to your toddler as apple juice and mash the apples for a smoother consistency.