Firstly in a bowl add grated boiled potatoes,onions finely chopped and tomatoes

Some green chillie,masalas,oregano,and salt as per taste....

Mix it well and keep aside

Take 2 sliced bread put the one layer of tomato ketchup in one slice bread and on the other slice spread some mayo

Then in a centre add prepared potato mixer...on it spread some cheese

Close the bread and spread butter on both the sides

Toast it

Then cut with knife and sprinkle cheese on the top

Prepared rest of the sandwich in a same process

Serve with tomato ketchup

Its ready