Chocolate Raspberry Pavlova

I've never made this recipe - but it looks fantastic. It's a Nigella Lawson recipe so be sure to nibble while you cook and enjoy her scientific terms, i.e. squidginess. This one took some extra work to convert the ingredients to standard US measurements and it's my first attempt to add a picture. I'll keep you "posted" if I give it a try...

For the chocolate meringue base:

6 egg whites

1 1/3 c sugar

3 tablespoons cocoa powder, sieved

1 teaspoon balsamic or red wine vinegar

2 oz dark chocolate, finely chopped

For the topping:

2 c double cream

2 c raspberries

2-3 tablespoons coarsely grated dark chocolate

Preheat the oven to 350 and line a baking tray with baking paper. Beat the egg whites until satiny peaks form, and then beat in the sugar a spoonful at a time until the meringue is stiff and shiny. Sprinkle over the cocoa and vinegar, and the chopped chocolate. Then gently fold everything until the cocoa is thoroughly mixed in. Mound on to a baking sheet in a fat circle approximately 9 inches in diameter, smoothing the sides and top. Place in the oven, then immediately turn the temperature down to 300 and cook for about one to one and a quarter hours. When it's ready it should look crisp around the edges and on the sides and be dry on top, but when you prod the centre you should feel the promise of squidginess beneath your fingers. Turn off the oven and open the door slightly, and let the chocolate meringue disc cool completely.When you're ready to serve, invert on to a big, flat-bottomed plate. Whisk the cream till thick but still soft and pile it on top of the meringue, then scatter over the raspberries. Coarsely grate the chocolate so that you get curls rather than rubble, as you don't want the raspberries' luscious colour and form to be obscured, and sprinkle haphazardly over the top, letting some fall, as it will, on the plate's rim. Serves 8-10.