Chocolate mousse, espresso sabayon with slow-roasted strawberries and chocolate shards

good-quality dark chocolate

free-range eggs, separated

brown sugar

cream

For the espresso sabayon:

free-range egg yolks

sugar

espresso, cooled

For the slow-roasted strawberries:

strawberries, leaves removed but stalks intact

icing sugar

For the chocolate shards:

chocolate, melted