- Marinate fish by adding red chili powder, pepper powder, turmeric powder, and salt. Keep them aside for 20 to 30 mins. In a wok, add gingelly oil on medium flame and add fish to it. Fry the fish in the oil till it becomes To make gravy use a separate pan. Add gingelly oil, mustard seeds, and fenugreek seeds. Sauté them till they splutter. Add curry leaves, ginger, garlic, and green chilies. Sauté them till it turns golden brown. Add chili powder, Asafoetida, pepper powder, turmeric powder, and Fry them well. Add ¼ cup water to the gravy and boil it well. Add fried fish to the gravy and mix well. Dry roast mustard seeds, cumin seeds, fenugreek seeds and grind them into powder. Add the ground powder to the pickle. Mix well and store.