Step by step recipe:

1. 5 min.

   Prepare the cream mixture

   Mix in a bowl with a whisk: 200 ml liquid cream, 3 egg yolks, 10 g Vanilla sugar and 50 g caster sugar.
   
   Set aside.
2. 5 min.

   Toast the almonds

   Use a small non-stick frying pan on high heat. Tip in 50 g ground almonds and dry roast lightly, stirring constantly with a wooden spatula or spoon.
3. 
   Take off the heat as soon as the almonds begin to colour slightly.
   
   This process brings out the full flavour of the almonds.
4. 1 min.

   Assemble the gratin

   Preheat the oven to 390°F (200°C).
   
   Butter a gratin dish.
5. 7 min.
   Peel 1 kg 500 g apple and cut into small pieces.
   
   Spread half the apple pieces in the dish.
6. 2 min.
   Scatter the toasted almonds over the top.
7. 2 min.
   Add the rest of the apples and pour the cream mixture over.
8. 3 min.
   Scatter a little caster sugar on top and add slivers of butter to help the top brown.
9. 40 min.

   Cooking and serving

   Cook in the oven for 40 minutes.
   
   Serve either warm or cold, on its own or, if you can't resist good things, with a little whipped cream.