Green chutney: Grind together 1 cup tightly packed cilantro leaves, 1/2 cup mint leaves, 1 small piece of peeled ginger, 2 green chilies, 1 tablespoon lemon juice, cumin powder, salt and chaat masala powder. Make a thick spread like chutney, not very watery one.

In the mean time boil 2 large potatoes. Peel and mash the potatoes very well. Heat 2 teaspoons oil in a kadai. Temper with 1/2 teaspoon cumin seeds, 1 slit green chilli. Add mashed potatoes, salt and garam masala. Saute for 5 minutes till the raw smell of garam masala goes off. Transfer to a bowl.

Take a bread slice and trim the edges if you prefer. Apply salted butter on one side liberally. Apply green chutney and spread well.

Spoon in some mashed potatoes and spread well. Top with sliced tomatoes, capsicum and onions, Sprinkle some chaat masala powder. Take another slice of bread slice and apply butter on both sides.

Toast the prepared sandwich in a sandwich maker or tava.

Serve masala toast sandwich hot with tea/coffee/milkshake.