Trim the tops off the berries and roughly chop. Freeze until frozen solid.
Break the frozen berries up and place in a food processor with the sugar and a drop of cream.
Start the motor going on your food processor and trickle in more cream until the mix comes together.
Take it slowly, though, and don't go mad with the cream as the berries will warm up as they churn, gently softening the mix to the most stunningly fresh homemade ice cream you'll ever dip your spoon into.