Put aside the chapati or tortilla (whichever you are using).
In a large bowl add all the other ingredients.
Using two large spoons mix all the ingredients very well.
The mayonnaise and mustard sauce not only render taste but also act as binders.
Lay out all the chapatis on a working surface.
Spoon the filling on the chapatis. You need to check how much filling your chapatis can take and accordingly place the filling.
Gently lift one side of the chapati and start rolling. Roll it tight and immediately pack it in foil or cling film.
Pack your meal and you can get going.
If you are in a hurry in the morning you can make the preparations a day earlier.