Add turmeric powder, salt and mashed potatoes. Mix well and cook for a couple of minutes.
Add 2 tbsp of water and cook to get semi soft consistency curry.
Add chat masala and chopped coriander leaves. Mix properly and keep it aside to cool down.
To prepare variuous sandwiches, you'd again require:-
Butter - As reqd
Green chutney - As reqd
First method:-
Apply butter on one side of the bread slice. Apply green chutney on the top.
Apply a thick layer of potato stuffing uniformly over the bread.
Apply butter on the tawa and place the bread slice and slightly press the sandwich while roasting so that the masala sticks to the sandwich. Fry till both sides of the bread slice become crispy.
Second method:-
Apply butter one side of the bread slice.
Apply green chutney and arrange sliced vegetables like onion, tomato, capsicum and carrot. And serve. There is no need to toast/grill.
Third method:-
After spreading the green masala on the bread, cover it with another bread.
Pour some slightly beaten curd with sugar on the top.
Put some pepper powder or chaat masala over it and serve it as Curd sandwich.
Fourth method:-
Take a slice of bread and dip into the water and squeeze.
Fill the above potato-peas mixture on one side of the bread slice and fold with the other side.