Heat oil in a wok. Deep fry bhindi until semi crunchy.
Place the fried bhindi on tissue to absorb excessive oil. Save for later use.
For Achari Masala: Heat oil in a medium sized pot, add chopped tomatoes and sauté until tender.
Add ginger paste and stir well.
Mix together black mustard seeds, fennel seeds, mustard seeds, fenugreek seeds, cumin seeds, nigella seeds, salt, red chili powder, ground cumin, and ground turmeric until all the spices are well incorporated.
Further add mango powder and yogurt. Mix and cover; simmer for about 5 minutes.
Add the fried bhindi along with chopped green chilies, and mix well.
Garnish with coriander leaves and green chilies and serve.
Enjoy!