Microwave potatoes on high for 3-4 minutes with the lid closed. Let it cool down, peel off the skin and mash the cooked potatoes.
To a pan, add oil, followed by mustard, fenugreek and cumin seeds. Once they sizzle and pop, add curry leaves. Lower the flame here if required.
Add chopped green chili, ginger paste and saute for 1-2 minutes.
Add spices like turmeric, chili powder and salt. Saute for 30 seconds and make sure they don't burn.
Add cooked potatoes and mix well. Add chopped coriander, lime juice and give it a good mix.
Mix the ingredients for the chickpea batter - chickpea and rice flour, spices, salt and baking powder. Gradually add water and whisk until smooth.
Shape your potatoes into a ball and dunk it in the mixture.
Heat up oil for deep frying in another pan. Make sure oil is not too hot. Gently place the potato coated in batter into the oil and fry until golden.
Take them from the pan and place on a paper towel to drain any excess oil.
Once done frying the patties, spoon some of the excess batter with a spoon or fork and drop them into the hot oil. Once they crisp up, take them out. This is called Boondi.
Similarly, drop the green chillies in the oil and be careful during this process. Take the chillies out once they are fried.
Slide your ladi pav into half and spread some vegan butter. Pan fry until toasted.
Layer the bun with tamarind chutney, green chutney, boondi and vada. Place a green chili before covering with the other slice of bun. Serve!