Preheat the oven to 150° C/300°F/Gas Mark 2 and line tray with baking parchment.
Beat the egg whites until fluffed up and stiff. Beat in the sugar until stiff and shiny. Do this a tbsp of sugar at a time
Sprinkle over the cocoa and chocolate and then fold it all in. I sometimes whisk the cocoa in before folding in the chocolate and it does not seem to matter at all.
Shape into a disc shape about 9 inches in diameter whilst drawing up the sides a little so as to contain all the cream and raspberries later.
Place into the oven and then bake for 1 to 1 hour fifteen minutes. I sometimes do it in my Aga simmer oven for about 2 hours. (110 C)
Let the pav cool completely before whisking the cream to soft peaks and tumbling on the raspberries (love a tumble)
You could also decorate with dark chocolate gratings for a bit of razzle.