Marinate chicken with salt, black pepper, red chilli, lemon juice, garlic ginger paste for 30 minutes.
Whisk egg whites till soft peaks form.
Heat oil in a deep frying pan.
Add flour into the chicken and mix.
Now coat each chicken piece one at a time, first in egg white and then into the potato/chapapati flakes.
Fry each chicken piece till golden brown.
Wrap each chicken piece in a chappati (roti), filling in with mayonnaise, tomato ketchup and lettuce.