- 150ml/5fl oz double cream
 - 55g/2oz caster sugar
 - 1 lemon, juice only
 - handful blackberries
 - 55g/2oz blackberries, peeled and chopped
 - 30g/1oz caster sugar
 
- Whip the cream, sugar and lemon juice in a bowl until thickened.
 - Place a chefs' ring on a serving plate and arrange the blackberries on the base.
 - Spoon the lemon mixture on top, smoothing off the top with a palette knife.
 - Remove the ring.
 - Meanwhile, blend the blackberries and sugar in a mini-food processor until smooth.
 - Pour over the lemon mousse to serve.