Begin by making the raspberry puree, heat the raspberries with the sugar and lemon juice over medium heat until the raspberries have softened and the sugar has dissolved
Blitz the mixture with a stick blender until smooth
Pass the mixture through a fine mesh sieve to remove the seeds, then let the puree cool before making the ice cream
Chop the chocolate into fine shards
Once the puree has cooled, whip the double cream, vanilla and condensed milk together in a large mixing bowl until it reaches soft peaks.
Add the puree and stir into the ice cream base until fully combined.
Add the chopped chocolate and fold into the mixture so it is fully combined.
Pour the mixture into a freezer safe container and cover with a lid or cling film.
Freeze for at least 4 hours