Heat the oil in a sauce pan on medium high. Test the heat by adding one cumin seed to the oil; if seed cracks right away oil is ready.
Add cumin seeds after seeds crack add asafetida, green chili and turmeric, stir for a few seconds.
Add bananas, ginger, mango powder and water stir gently and cook only for a minute, don’t overcook otherwise banana will become mushy and watery.
Turn off the heat and add salt and cilantro mix gently and serve.