For tadka method:- Take a small kadhai add oil rai jeera curry leaver green chilli paste coriander urad dal garlic crushed haldi powder let it sprinkle for 1-2mins..then add to boiled and mashed potatoes..add salt to taste..then mix properly

Then make small balls and flatten a little...

For besan batter method:- mix all three ingredients until there is no lumps..then add one by one aloo vada in batter then fry in oil..until it turns to golden brown..

Ur vada is ready for vada pav...serve with pav and chutney....