Grind tomatoes, carrot, coconut, ginger, green chillies, red chillies and curry leaves.
Next add the drained rice, salt and water as required to grind to a smooth paste ( I
use a mixie for this not the wet grinder).
Add the finely chopped onions and stir.
Pour the batter in a swirling motion (like making regular dosas) on a hot pan. Drizzle some oil on it.