Make a hole in all the Brinjals at the bottom with knife, Roast all the brinjals on open flame till it became soft. Remove the skin and cut it into the small pieces.
Heat oil in pan then add cumin seeds, when cumin seeds started popping add spring onions and red onions, saute it well for 2-3 minutes.
After 2 minutes add ginger, green chillies and tomatoes, mix it well and cook it for few seconds.
Now add salt and mix well, now add hing or asafoetida, red chilli powder and mix it well, when all the veggies get cooked add smoky and open flame roasted brinjals and mix well.
Now add little bit of coriander and cumin seeds powder and let it simmer for just 1 minute, after 1 minute turn the heat off and add coriander leaves in it and mix it nicely.
Delicious gujarati style baingan bharta is ready, serve it bajre ka rotla or millet flour bread or chapatti and enjoy.