In a food processor, combine the cookies and butter. Whiz away until the mixture resembles wet sand. Alternatively bash the cookies up with a rolling pin and ziplock bag, then transfer to a bowl and mix in the butter.
Press the mixture onto a 9 inch tart/ pie pan, going up the sides. Refrigerate this mixture until ready to use.
In a food processor, blitz the raspberries until they are smooth.
Pour into a saucepan and bring to a boil, stirring occasionally.
Meanwhile, place the chocolate into a bowl.
Pour in the raspberry mixture. I like to strain it in to remove the seeds- and the mixture is nice and velvety- but this is optional.
Wait 30 seconds before stirring so the chocolate has a chance to melt, then stir until smooth.
Add in the ⅓ cup of cream, stir and cool completely.
Whip the ⅔ cup of cream until it has soft peaks. Add in the cooled chocolate mixture and gently fold in, being careful not to deflate the mixture.
Spread on top of cookie crust and chill until ready to serve.
Garnish with melted chocolate curls and raspberries