First apply oil to kadhai and cut brinjal into pieces and roast it by covering lid... when brinjal gets roasted remove the skin and mashed with hands and keep aside..

Heat oil in pan add asafetida cumin and mustard seeds.. add chopped onion and roast till it turns soft now add chilli, ginger, garlic paste and dry masala and cook it till it leaves oil..

Now add tomatoes and cook till it softens.. add salt and water and boil it...