In a bowl, add mashed potatoes, veggies (after getting it to normal temperature), salt, red chilly powder, Mango powder, cumin seeds powder, carrom seeds, chopped green chillies, grated cottage cheese and coriander leaves. Mix it well.
Add mayonnaise and green chutney in the filling (can be used as a spread on bread slices as well)
Mix everything well and have it ready as seen in the pic
Take brown bread and spread some mayonnaise on one side and other side with pudhina (mint) chutney stuff in between with the filling. For the open sandwich apply the mayonnaise and mint chutney both on one slice and than spread the filling also on it.
Now add little butter in the stack and place the sandwich over it
Cook both the sides till they turn brown, even the open sandwich.
Cut into 2 halves and garnish with grated carrot and cottage cheese, open sandwich can be served by cutting into 2 halves or just like that.