Heat oil in a pan and add mustard seeds, when they crackle add green chilies.
Add chopped curry leaves, coriander, fennel, mint leaves and remove from flame.
Take boiled and mashed potatoes in another bowl and add mixture to it.
Add chopped mint leaves, turmeric powder and salt to taste. Mix well.Keep aside.
Inside of bread, apply green chutney and garlic chutney on each side.Cut them into 4 parts. cover and shallow fry with butter to crisp.
Cut cheese slice into 4 parts and place inside the crispy slices.
Mix all the ingredients of covering and make semi thick better from it by adding sufficient water.
Cover square ready bread slice with potato mixture properly.Heat oil. Dip vada in better and fry in hot oil.When ready drain on absorbent paper and keep aside.
Serve hot Cheese Vada Pav with tomato ketchup and green chutney.