I grew up in Karachi and I am very familiar with it's food scene. We have "Roll" shops there which serve BBQd kababs in fried bread(Parathas/Puri). While I have seen a few Pakistani restaurants carrying rolls, none of them have been able to do it justice except these guys.
Their Chicken Garlic Mayo (Malai boti) and Bihari Kabab Roll tastes EXACTLY the same as it would taste from a street shop in Karachi's small neighborhoods. We have tried some of their Tawa masala offerings as well and nothing has been anything less than amazing.
This is a Take-away only place with a few seats to sit down and wait. Order takes about 20-35 minutes to get ready, the owner is a nice guy usually gives a correct ETA.
I have traveled from Ajax to Missisauga just to have these rolls, thats how good they are.