Granita di Pantelleria

• 1.5 kg very ripe mixed raspberries and blackberries
• juice of 2 lemons
• finely

Put the berries in a stainless-steel pot over a medium heat and let them burst and release their juices, stirring from time to time. Add the lemon juice and zest, followed by the sugar, and cook for 15 minutes, still stirring. When the sugar has melted, leave the mixture to cool. The berries will have almost dissolved, so there should be no need to strain, but if you are sensitive to texture, y