If your confused about this delicious Indian street snack from the Wikipedia:

Kati roll is a street-available fast food popular in Kolkata, India. In Kolkata, it is thought to be introduced by Nizam’s, a restaurant in the city noted for its Mughlai food^{[citation needed]}. In Mumbai, it is similar to a frankie.

It is said^[who?] that the kati roll was the result of some quick thinking on a busy day, when the number of customers purchasing kebab and parathas outstripped the rate at which plates could be washed, so the chef decided to wrap some of the kebabs in parathas rather than serve them on plates.

The basic kati roll begins with paratha toasted on a tava. Whipped egg is poured in the tava’s center and topped with the bread. Fried vegetables are roasted in butter and stuffed inside. Spices, red onion slivers and lime are sprinkled on top. Spicy potatoes, paneer, chicken tikka or mutton can also be stuffed inside. At certain outlets, the kati comes wrapped around a non-greasy rumali roti.

In Kolkata, the prominent joints serving delicious rolls are in Golpark area like Bedwin, Shiraz, Iceberg, MyRoll Junction etc.