My Maa has plenty of time saving kitchen tricks up her sleeve. Same goes for her ability to use up leftover dishes. Though I can not fathom the crisp chapatis that she fries up every other day for breakfast but pretty much follow her ideas for other things.
This bhat bhaja (bhat means cooked rice, bhaja is frying) is perfect to use up the short grain par boiled rice that most Bengalis eat on regular basis. For the uninitiated Parboiled rice is the result of a process where rice, still in its brown rice grain form is either parboiled or steamed and then dried in its husk. The milling process comes next. The resulting grains are lest brittle, yellow in colour and have more nutrients as the Thiamine moves from its husk to the grain. but this process also causes a gelatinisation of the starch in the grains and therefore par boiled rice are often thicker than regular milled white rice. (info:Wiki)