I drove to this place, after searching online for halal food in Mestre. After seeing the biryani picture, assumed this was a proper restaurant. It was not the case. It is purely a take-out place mainly focused on kebabs. You can however stand and eat as there is table-like shelve to place your food. Outside the take out it does not say 'Buonissimo', but something like 'Khan's take-away'.
The person serving was quite friendly, and the cost of the food is not high at all - so teenagers would love it.
And I did get exactly the biryani in the picture - ABSOLUTELY DELICIOUS! So in the end I was not disappointed at all for making the trip.