Pass the French toast flavoured cream into a jug, through a sieve, squeezing as much liquid out of the bread as possible.
Next, place a medium saucepan onto a set of scales & pour in the infused cream. If necessary, top up with double cream so there's 250 grams of cream in total.
To the cream, add the milk, ½ the light brown sugar, glucose, vanilla & salt.If you're using a vanilla bean, scrape out the seeds & add in both the seeds & pod. Whisk to combine then place over a low heat.
In the meantime, whisk together the egg yolks & remaining sugar in a large mixing bowl.
When the milk is steaming (don't let it boil!), pour a third into the yolks, whisking as you do so.This is called tempering the yolks. Pour the now tempered yolks back into the saucepan then cook over a low heat until the custard reaches 82°c, making sure to stir constantly with a rubber spatula.
Remove from the heat, remove the vanilla pod (if using) then give the custard a quick blitz with a stick blender.
Pass into a bowl, through a sieve & leave to cool, stirring occasionally.
Once cool, place a piece of baking paper onto the custard’s surface & refrigerate overnight.