Wash the spine gourds (kantola) well.
Cut open the kantolas and chop them into thin slices. The tender kantolas can be chopped along with theseeds. In case of mature/ripe kantolas, remove the seeds and then chop the gourds. Keep chopped gourds aside.
Chop the onions into thin slices and keep aside.
Heat oil in a pan. Add mustard seeds, cumin seeds and asafoetida. Add crushed garlic. Saute on low heat till the garlic turns golden in colour.
Add chopped green chillies and chopped onions.
Sprinkle a pinch of salt over the onions and saute on low heat till the onion turns golden in colour.
Next, add chopped kantolas and give a quick mix,
Add turmeric powder and mix.
Cover and cook on low heat till the kantolas become soft, while stirring at regular intervals.
Add red chilli powder, cumin-coriander powder, garam masala and aamchoor.
Mix well and cook on low heat for few more minutes.
Check the seasoning and add salt if required.
Garnish with chopped coriander leaves.
Serve hot with chapatis.