The Kolkata Egg Roll is the Kolkata street roll in its plainest, most defining form: a paratha with a beaten egg cooked directly onto it, rolled with onion, green chili, chaat masala, and lime juice. The angle is the egg layer itself, set straight onto the bread on the griddle so the two cook into a single sheet rather than the egg sitting as a separate filling. It is the baseline against which the meat versions are measured, a lean, sharp, handheld format where the egg-bonded flatbread and a few bright seasonings are the whole thing.
The build is sequential and the egg step is the signature. A flaky maida paratha is fried on a hot tawa until it blisters in patches. A beaten egg is then poured over one face of the bread while it is still on the griddle and the paratha is flipped so the egg sets directly against the dough, fusing into the surface. The egg-coated bread comes off, is laid egg-side up, and gets a line of thinly sliced raw onion, slit green chili, a dust of chaat masala, and a squeeze of lime down the center. It is rolled tight into a cylinder and half-wrapped in paper. Good execution gives an egg layer fully set and bonded to a crisp, supple paratha, with the chaat masala and lime sharp enough to register tang on every bite and the raw chili and onion cutting clean through. Sloppy versions pour too much egg so it slides off in a wet curd instead of bonding, leave the paratha slack and underdone so it tears, or skip the chaat masala and lime so the roll tastes of nothing but oily bread and egg.
Variations stay close to the formula. A double-egg version doubles the egg sheet for more richness; some stalls add a slick of chutney or extra chili for those who want it hotter. The seasoning is otherwise fixed by the source: onion, green chili, chaat masala, lime. The chicken roll and the fish roll come from the same wrapper logic but carry their own proteins and are distinct members of the family, each deserving its own article rather than being crowded in here. What stays constant is the source's specification: a paratha with egg cooked onto it, rolled with onion, green chili, chaat masala, and lime.