Peel and grade the lauki.
In a mixing bowl take leftover rice and mash with fingers. Add grated lauki.

Add onion,green chillies,red Chilli powder, coriander powder,Chilli flakes, cumin powder, turmeric powder,salt and finally add sambhar masala.mix well.cover and keep this batter aside for 15-20 minutes

After 15 minutes the lauki releases water so the batter is slightly sticky now we add besan to absorb its water and finally add coriander leaves and mix again.

Take oil in a kadhai heat on high flame then turn the flame medium. Drop small portion of the batter for pakoda with spoon or hands.Fry on medium to high flame till they turn golden brown. Remove from oil and place on absorbing paper