1 mug of green tea with 3-4 teaspoons of sugar dissolved in it and allowed to cool
juice of 1 lime
2 large, ripe mangoes cut into pieces
Blitz it all in a food processor. Taste and if necessary add a little more sugar dissolved in water.
Freeze for 1-2 hours until sludgey, then blitz in the food processor again to break up ice crystals. Put back in freezer. When serving take it out of the freezer about 10 mins beforehand to allow to soften a little.
You could do a version of pudding which I've had in a restaurant - which is frozen summer berries and hot white choc sauce - if you did it with low fat creme fraiche, a low cal sweetner and vanilla essence (mix and heat gently + serve on big flat plates with a bit of icing sugar round the outside for elegant effect... you'd prob get the same effect and low fat ... ?
I'd just go for a huge bowl of fresh mixed berries (they look fab in a glass or a white bowl), with ice cream/creme fraiche/sweetened marscapone and shortbread, all served seperately. Very easy, no last minute prep, looks lovely and low cal coz you can just have the fruit