Add finely chopped onion and coriander.

Add green chillies,adjust it according to your preference of spice.

Add chilli powder.now add chaat masala,lemon juice and salt.

Mix well and keep aside. our stuffing is ready.

To proceed making the potato sandwich.

Take a two bread slice and apply 1/2tsp of butter on both slices and spread it evenly.

Put 1 tsp of tomato ketchup on both the buttered bread slices and spread it evenly.

Put a portion of the stuffing on one buttered slice,spread it evenly.

Cover it another buttered slice and press it lightly.

Apply 1/2 tsp of butter on it and spread it evenly.

Heat 1tsp of butter on a non-stick tawa ya sandwich maker.

If you use to tawa then place the prepared sandwich on it with the butter side facing upwards.

Cook on medium flame to till both sides turn crispy and golden brown in colour.

Remove on a plate.

Cut sandwich equally into 2 pieces and serve with Tomato ketchup ya green chutney.