To prepare the hung yogurt, hang 2 + 1/2 cups of yogurt for 6-7 hours to get the mentioned amount of chakka/hung yogurt.
Soak 1 cup of dates in enough water for half an hour. Drain the water, remove the seeds and puree the dates to a smooth paste.
In a large bowl take the hung yogurt.
Using a ballon whisk give it a good whisk to derive smooth and fluffy thick yogurt.
Add the pureed dates and vanilla paste and whisk well.
Now add the diced mixed fruits and fold them into the yogurt mix.
Transfer to a serving glass bowl and chill it well.
Serve chilled with Puris.