Boil and mash the potatoes. Put some oil for vagar/tempering. Add cumin seeds, mustard seeds and curry leaves.

Add all the powdered masalas mentioned above and add lemon juice. Add the vagar over it and mix well.

Cut the bread slices in circular shape and spread some mixture of potatoes and top it with another bread slice and grill from both sides.

Now cut the slices from the middle and garnish the sandwiches with sev.