Finely chop the liquorice with the universal chopper. Beat the egg whites until stiff, adding 200 g sugar and 1 pinch of salt. Continue beating until the sugar has dissolved and the mixture is shiny. Sieve the starch on top, add 1⁄2 TL lemon juice and stir in.
Preheat oven (electric cooker: 100 °C/circulating air: 75 °C/gas: see manufacturer). Line a baking tray with baking paper. Draw a circle (approx. 20 cm Ø) on it. Turn over the baking paper. Form the egg white mixture on the paper in a circle to form a high cake base.
Sprinkle with finely chopped liquorice. Dry in a hot oven for about 2 hours. Leave to cool in the switched off oven with the oven door slightly open.
Wash plums, halve, stone and cut into slices. Simmer 50 g sugar, remaining lemon juice and 2 tbsp. water until the sugar is dissolved. Add the plums and toss briefly. Leave to cool in lemon syrup.
Place the meringue base on a cake plate. Whip the cream until stiff and fill into the meringue just before serving. Add plums with lemon syrup. Drizzle chocolate-liquorice sauce over it as desired.