Begin by making the topping. Peel and slice the apples. In a pan put the water and sugar, begin with a low heat until it begins to bubble and then turn the heat up until it turns amber. Make sure not to stir it, as tempting as it is!
Put the silicone mold in the Omnia and carefully pour the sauce into it. Very carefully place the sliced apples in the sauce.
Start with the cake. Beat the butter and sugar together until pale and fluffy. Sift the flour with the bicarbonate of soda.
Add 2 tbsp of the flour to the butter mixture along with 1 of the eggs.
Repeat this process until the flour and eggs are gone.
Stir in the milk and vanilla.
Pour the mixture into the Omnia and smooth with a metal spoon.
Bake over a medium flame for 50-55 mins.
Turn out when baked being careful of any hot caramel. Leave to cool.