In a chilled bowl, whip the cream to soft peaks. Cover and refrigerate until needed.
Place chopped chocolate in a heat-proof bowl and melt over a pot of simmering water. Set aside.
Place egg yolks, 2 tablespoons icing sugar, vanilla, salt and espresso in a heat-proof bowl and whisk to combine. Then place bowl over the pot of simmering water and whisk until light and frothy (approx 5 mins). Remove from the heat and whisk with a handheld blender until doubled in volume.
Mix melted chocolate into egg yolk mixture.
Beat the egg whites with the remaining 1 tablespoon icing sugar to soft peaks.
Gently fold the egg whites into the cream. (Again gently) fold in the chocolate mixture one third at a time. Place into serving vessel of choice and refrigerate for 3 hours or overnight.
Suggestion: Serve with fresh berries and a dollop of whipped cream.