Put the banana and strawberries into your food processor and leave for a few minutes to slightly soften and then process.   Depending how powerful your machine is you may need to add a little milk and scrape the sides of the bowl down to speed the process along.      The fruit will slowly transform into a fluffy whipped ice "cream" resembling Mr Whippy ice cream.    Serve immediately with some more fresh fruit and a sprinkling of cacao nibs.   Eat immediately.