To make the batter, put the flour in a bowl and add enough water to make a thick batter.
Add the chilli powder, cumin, bicarbonate of soda and salt to taste.
Mix well.
Heat enough oil for deep-frying in a kadhai or deep, heavy-based pan to 180 degree C / 350 degree F, or until a cube of bread browns in 30 seconds.
Dip the aubergines in the batter and lower carefully into the hot oil.
Deep-fry for about 2 minutes, or until golden and crisp.
Remove with a slotted spoon.
Drain on kitchen paper (paper towel).
Serve with puffed rice and sliced coconut.