Cut bread into one-inch cubes, removing the crusts, if desired (this will give a creamier centre). Place into the non-stick bowl of your Redmond Multicooker.
Sprinkle over the Bramley apple pieces and the sultanas, if using.
In a bowl, combine the eggs, milk, maple syrup, brown sugar, cinnamon, nutmeg and vanilla. Whisk well until combined and then gently stir in the melted butter.
Gently pour this mixture over the bread cubes and stir to mix, taking care not to break up the bread pieces.
Sprinkle with the demerara sugar and dot with a further 10 grams of butter.
Select MULTI-COOK on your Redmond Multicooker. Set the temperature for 40 C and the time for one hour. Cook until the program finishes.
Select CAKE and set the time for 50 minutes. Cook until the end of the program.
When the timer has finishes you'll notice the casserole is risen and puffy. Leave with the lid off for a few minutes until the casserole settles and cools a bit before transferring, upsidedown to a serving platter.
Sprinkle with icing sugar and serve, warm, with extra maple syrup and some fresh fruit.
Mum of three, daydream adventurer, OU Life Sciences graduate, occasional crafter, ex-pat Canadian & quite possibly Britain's most northerly food blogger.