First lets make filling

1st. Boil chicken with just black pepper and salt and shread it to small pieces. Add mayonise in it. Add black pepper and keep it aside

Slice cut onion, tomato, and potato. Sprinkle little salt, red chilli powder and pepper and chat masala on it and keep it aside

Spread green chutney on two slices. First arrange veggies on one slice then chicken and then again veggies. Veggies will work as a barrier to make bread wet with mayonise. Now close bread with chutney side in.