20 mins plus freezing time
200ml (6 ½fl oz) boiling water
185g (6oz) caster sugar
Juice 1 lemon
250g (8oz) fresh or tinned mango
Combine the water and sugar in a small saucepan. Bring to the boil over a medium heat, and stir until the sugar has dissolved. Allow to cool completely.
Purée the lemon juice, chopped mango and sugar syrup in a blender until smooth. Taste and add extra juice or sugar, if desired.
Churn in an ice-cream machine until firm. Alternatively, pour the mixture into a shallow lidded container, then cover and freeze for about 3 hours, or until a firm ring of ice appears around the sides and base, and there is a soft slush in the centre. Transfer to an electric mixer or food processor and beat until smooth. Return to the freezer until firm, then beat and freeze 2 more times.