Cut off the stem end of the bananas. Then, use a sharp knife to make a vertical slit on the bananas. Make sure you don’t cut through them. Now, use your fingers to open the outer skin. Slice the bananas lengthwise. Set aside.

Heat oil in a heavy bottomed pan. Add mustard seeds, and let it splutter. Throw in curry leaves and dried red chillies, and fry for a few seconds. Now, add the sliced onions, and fry until they get a brown color.

Add the sliced bananas. Sprinkle with ground turmeric and enough salt. Stir well. Cover with a lid, and cook, stirring occasionally, until done.

Serve banana stir fry with rice.