Heat oil in a pan. Add methi seeds, mustard, and cumin seeds.
Add curry leaves and (green chillies, garlic, ginger) paste. Saute well.
Add hing powder and all the chopped vegetables.
Add salt and saute for a minute. Then, add a little water and let it cook on low heat.
In a separate bowl, mix besan flour with yogurt without forming lumps. Add water and mix well.
Add cumin-coriander powder, turmeric powder, kashmiri chilli powder, and salt. Mix well and set aside.
Ensure the vegetables are about 60% cooked.
Add the yogurt mixture to the cooked vegetables.
Add more water as needed and stir continuously until it boils.
Once it boils, reduce the heat and let it simmer for 15-20 minutes.
Garnish with coriander.