Hot chocolate fondants with summer berries and mint froth

Ingredients For the fondants 190g/7oz dark chocolate, at least 60 per cent cocoa solids 100g/3┬Żoz butter, softened 35g/1oz ground almonds 2 large free-range eggs, separated 35g/1oz cornflour 85g/3oz caster sugar 3 plain chocolate truffles For …