I used the very fine stevia which didn't need heating up, but if you use the granulated kind you would need to melt the sugar in the water and bubble it for a few minutes and then leave it to cool down.

With the fine stevia, I added it with the water and lime juice to the strawberries which were pureed. Mix it up in a blender for several minutes until you have a smooth mix. Some might prefer it to be put through a sieve at this point, but I just use mine as it comes out of the blender.

You can taste the mix here to see if it is sweet enough for you. If it isn't sweet enough, simply add a little more stevia, whizz it around for a while, then taste once again.

Chill the pureed mix in the fridge for an hour and put it in the ice-cream maker for 20 - 30 minutes, or until it turns to a thickening slushy consistency.

Simply add it to a container and put it in the freezer for a couple of hours before serving.

If you make it without an ice cream maker, put your mix into a container and put it in the freezer for a couple of hours, then take it out and put it back into the blender to whizz it up again. Then simply put it back into it's container and to the freezer once again for another couple of hours.