Whisk the custard until you get a fluffy light cream. (You won’t get proper whipped cream consistency).
Cut the cake into thin slices.
Cover the base of two or more individual glasses or other dessert pods with the cake slices. Add a piece of roasted plum, including some sauce/syrup. Spoon some custard over the plum.
Repeat the layering process. Finish off with a layer of custard.
Decorate the top with nuts, vegan chocolate shavings or a star anise from the baked plums.
Refrigerate for a couple of hours before serving.