At the times of the year when I do not have purslane, I replace it with rocket leaves or foraged wild greens.
The scrambled eggs can be prepared in advance as the cream in the recipe prevents the eggs from setting into a hard mass. Smoked Mackerel is an excellent substitute for the salmon.
This is a rich and concentrated mousse with a texture that I really like. The combination of the chocolate and the burnt sugar caramel works really well. I like to serve this with caramel sauce and thick pouring cream. Sometimes I can get Jersey cream, and that is just heavenly.
Caramel sauce is a very useful dessert sauce with many uses. Clear and shiny and as richly coloured as well-polished mahogany, it needs to be cooked with care. Use a heavy saucepan with medium high sides and cook it on the heat furthermost from the edge of your cooker, so it is safely away from an awkward elbow or a child's inquisitive reach. It is vital to cook the sugar and water enough to achieve a deep 'chestnut brown' colour, as this 'burning' of the sugar tempers the sweetness of the sauce to achieve a balance that is neither too sweet nor too bitter. The sauce will keep for months in the fridge, but will thicken as it chills, so you may need to dilute it with a little warm water when this happens.