Vanilla whipped ganache
- In a saucepan, place the vanilla pod, its seeds and the cream. Bring to a simmer, then immediately turn off the heat. Cover for 1 hour to let it infuse.
- Rehydrate the gelatin with the water, set aside in the fridge.
- Bring the cream back to a simmer. Emulsify with the chocolate in 3 additions.
- Add the rehydrated gelatin and mix until smooth. Cover with plastic wrap in contact with the surface, refrigerate overnight.
Chestnut insert
- Rehydrate the gelatin, mix well, and refrigerate for 10 minutes.
- Blend the two creams together. Warm slightly in the microwave, then add the gelatin mixture. Mix until smooth. Add the candied chestnut pieces.
- Pour into 6 cm diameter rings, and refrigerate for 12 hours.
French meringue
- Take the egg whites out 1 to 2 hours in advance so they reach room temperature.
- Beat the egg whites to stiff peaks, starting at low speed and increasing every 1 to 2 minutes. Each time, add a little vanilla sugar.
- When they are very firm, add the remaining vanilla sugar and the powdered sugar, and whisk until smooth.
- Pipe onto 7 cm diameter half-sphere molds, trying to flatten the base.
- Pipe a few extra teardrop shapes.
- Bake for 2 hours at 100°C.
Chestnut vermicelli
- Mix the cream and paste until you obtain a smooth mixture.
Assembly
- Whip the ganache.
- Place the meringue domes hollow side up.
- Fill up to 1 cm from the edge with whipped ganache.
- Place the insert.
- Cover with whipped ganache, forming a dome.
- Pipe the chestnut vermicelli.
- Decorate with a large candied chestnut, meringue teardrops and candied chestnut pieces.