Mix rava, maida, rice flour together into a thick batter adding little water at a time so no lumps form. Mix by hand if you don't have a whisk or electric mixer. Add salt, crushed cumin asafoetida and leave in a warm spot for 6 to 7 hours at least.

When ready to eat, spray a non-stick pan lightly with oil and warm.

Thin out the batter to the consistency where it can be drizzled onto the pan with a spoon. Drop chopped green chillies and ginger into batter.

Sprinkle some of cut onions and cashews onto the pan and continuing on low-medium heat, drizzle the batter so that there is a latice work effect. A lot of holes is just the thing. Dribble a bit bit of oil around it and when the edges start turning brown coax it off the pan with a flat, wide spatula and flip it over. Remove in a few minutes and make more.

For the plain rava dosa leave out the onions.