Pressure cook the raw bananas for approx. 3 whistles.
Switch off the flame and let the bananas cool for a while. Peel the skin of the bananas and mash them. Keep aside
In a pan, heat oil and add cumin seeds and asafoetida. As soon as the seeds crackle, add cabbage and bottle gourd. Fry them till tender.
Add bananas and all the other ingredients. Mix well.
Cook till the mixture forms lumps. Keep aside to cool.