Grate the gourd and add a tsp of salt, mix well and let it sit for half an hour. Squeeze out all the water from the lauki, add the gram flour, coriander, chilli powder and baking soda and mix well so you can roll small balls of kofta. Add salt, if needed. Line a baking tray with baking sheet and spread a thin film of oil. Place the koftas and smear a little bit of oil on each and bake at 200C for 20 β 25 mins till done. You will get about 20 koftas. Set aside.