Dry fry fennel seeds, cumin seeds and fenugreek till the mix becomes fragrant. Grind this into a fine powder. Marinate the cleaned fish with chilli powder, turmeric powder and salt. Fry lightly (half-cooked). To this oil, add curry leaves, shallots/ onions, ginger-garlic paste and salt. When this starts frying, add all the dry masalas (including the powdered seeds) and sauté well on slow heat. Add half a cup of water and reduce the gravy till thick. On a piece of banana leaf, spread some masala. Place the fish and cover with some more masala. Make a packet out of the banana leaf and tie it with a string to secure it. Heat some oil in a griddle or a non-stick pan. Place each packet and cook both sides till the banana leaf turns brown.