Here is a great idea for healthy "ice cream".
Handful of frozen fruit per person (works really well with raspberries, blackberries etc.)
Couple of table spoons of natural chilled yoghurt
Use a heavy duty hand blender to smash up the fruit with the yoghurt (Note it needs to be heavy duty to deal with lumps of frozen fruit, and works best with a hand blender in a tall narrow container, see what I use below).
The frozen fruit freezes the chilled yoghurt and if you mash it up until the fruit is completely mushed up it makes a fantastic, almost instant, smooth ice cream.
If you have a sweet tooth you might want to add a little caster sugar but personally I prefer it without.
Don't try and make too much at once.
Have it with some fresh fruit (strawberries are great) and get you daily intake of vitamins in a yummy bowl full.
This is the blender I use:
http://www.bamix.com/de-luxe-190.html - was recommended by Gordon Ramsey and is fantastic - but not cheap, the bowl with this version can be used for grinding spices and even mincing meat, and this
http://www.bamix.com/krug-09-lt-214.html is what I use to make it in. You can even make "whipped cream" from chilled skimmed milk - see
http://www.youtube.c.../watch?v=dzVD5jCSpGg 
