When it come to boxed lunch always some kind of rice dishes are very popular. Among those Vangi bath/ eggplant/brinjal rice is very popular rice dish. Even the powder is named after this vangi baath, though we use it to make varieties of rice dish using the same vangi bath powder. Green eggplants gives a distinct flavor to the baath, we rarely get that variety here, so I am using the purple one.
Here is recipe to famous vangibath.