'Liquid core' – white chocolate and cardamom mousse with pistachio sponge

To begin, make the raspberry core for the domes by blitzing the raspberry purée and xanthan gum using a hand blender

Pour into the 2cm demi-sphere moulds and freeze at -18°C

To make the cardamom and coffee mousse for the moulds, place 50g of the cream, the coffee and the cardamom in a saucepan. Bring to the boil

Meanwhile, whisk together the egg yolks and sugar in a heatproof bowl until pale and smooth. Soak the gelatine in cold water

When the cream and coffee is almost boiling, pour a splash into the egg mixture and whisk to combine. Pour the egg mixture into the hot cream and coffee and stir until thickened and smooth

Pass the custard through a sieve and stir in the gelatine until fully dissolved. Add the white chocolate pieces and again, stir until smooth. Allow to cool

Whip the remaining 125g of cream to soft peaks and gently fold into the custard to finish the mousse

Half-fill the 5cm demi-sphere moulds with the cardamom mousse and place the frozen raspberry purée demi-spheres in the centre. Fill with a little more cardamom mousse and smooth the base with a spatula

Place in the freezer at -18°C until frozen

When the cardamom domes have completely set, make the white chocolate glaze. Melt the cocoa butter in a saucepan and stir in the white chocolate

Heat the mixture to 30°C and turn out the domes onto a wire rack. Pour the glaze over the domes evenly to create a smooth coating. Return to the freezer to set

To make the chocolate mushrooms, temper the white chocolate. Pour 250g of the white chocolate into a small siphon gun, charge with 2 N20 charges and pipe the stalks of the mushrooms into a container. Place in the freezer to set

Place a couple of spoonfuls of the tempered white chocolate into a small piping bag for the dots on the toadstools and set aside. Add a few drops of the red colouring to the remaining white chocolate

Pour the coloured chocolate onto sheets of acetate to create small disks. Transfer the coloured white chocolate to a piping bag and cut a very small hole in the end. Pipe some small dots of white chocolate on top to create the toadstool caps and allow to set

Once the stalks and caps have both set completely, pipe some tempered white chocolate onto the top of each stalk and place a cap on top

Remove the dome desserts from the freezer and loosely pipe the coloured chocolate over the top, as pictured. Return to the freezer to set

To make the raspberry sauce, simply blitz together the ingredients with a hand blender and store in a squeeze bottle

To make the pistachio sponge, blend together all of the ingredients using a hand blender until smooth

Pour into a siphon, charge with 2 N20 charges and squirt the mixture into plastic cups. Microwave for 30 seconds, allow to cool and break into pieces

Remove the dome desserts from the freezer 10 minutes before serving

To serve, create a ring of pistachio crumb around the centre of each plate. Place 2 of the demi-spheres on each place, then dot the toadstools, sponge pieces, raspberries, hazelnuts, edible flowers and dill fronds around the plate. Pipe dots of the raspberry sauce around the pistachio ring and serve