This was once Bombay’s hot selling (non-vegetarian) street snack until it was overcome by modern American junk food but this stuffed, rolled chapatti is still a favourite with many. The egg roti can be eaten separately from the meat as part of a main course, or, as here, made into a snack to eat on the go. To make your own red chilli paste, soak dried red chillies in a little water, until they become swollen and soft. Snip into pieces with scissors. Purée in a clean coffee grinder or small food processor. Place in a clean screw-topped jar and cover with a thin layer of sunflower oil to prevent air getting to it. Store in the refrigerator.