Put one chapatti on a working surface spread with green chatni
Boil potato slices top with capsicum, sprinkle with salt, chaat masala and black pepper, spread with 3 tbsp of grated cheddar cheese, top with 2nd chapatti, spread with chatni
Top with cucumber slices, tomato slices to cover the whole chapatti, sprinkle with salt pepper and chaat masla, top with cheese
Again 3rd chapatti spread with green chatni, onion rings, sprinkle with chaat masala, crushed red pepper and salt, spread with grated cheddar cheese
Top with final layer of chapatti.
Heat oil and butter in a fry pan, put prepared chapatti sandwich in the fry pan, cover with lid for 2 to 3 mins.
Over turn and cook the 2nd side for another 2 to 3 mins till brown.
Remove cut into wedges and serve hot with ketchup.