In Jain homes in Ahmedabad, Palanpur and Mumbai's Gujarati neighbourhoods, raw green banana takes the place of potato, so these vada are the Jain answer to batata vada, made for paryushan-season tea and for guests. The bananas are boiled, mashed and spiced with dry ginger, green chilli, lemon and a little sugar, rolled into balls, dipped in gram flour batter and fried. They taste much like batata vada but are slightly firmer, sweeter and fruity. There is no onion, garlic, potato or fresh ginger in this version. The common mistake is overboiling the bananas until they are waterlogged; the filling then goes sticky and the vada split in the oil, so cook them only until a knife slides in. Chef's tip: mash the bananas while warm with a potato masher, not a blender, so the filling stays light.