In a large kadai heat oil and add mustard, jeera, ginger. saute add boiled and mashed potato. add turmeric, chilli powder, chaat masala and salt. mix and mash potato well. turn off the flame and mix 2 tbsp coriander leaves.
Spread green chutney over 2 bread slice. top on one bread slice with slices of onion and slices of tomato. sprinkle a pinch of chaat masala to season vegetables. now spread a tbsp of prepared aloo masala. cover with another bread slices and spread butter.
Toast the sandwich with some butter to golden and crisp. spread green chutney and cut the masala toast sandwich into 4 pieces sprinkle sev and chaat masala before serving masala toast sandwich.
