Marinate fish head with turmeric powder and salt.
Take turmeric powder, cumin powder, red chilli powder and garam masala powder in a bowl and add little water to make a paste and keep aside.
Meanwhile, dry roast moong dal until the color changes to slight brown and fragrant.
Later, wash the dal and pressure cook it for 2-3 whistles in a pressure cooker with bay leaf, salt, and turmeric powder.
On the other hand, heat oil in a wok and fry the fish head till golden brown and keep aside.
Add whole garam masala, dry red chilli, and cumin seeds in the remaining oil.
Now add chopped onion and cook until transparent.
Next add ginger paste and combine well.
After that, add chopped tomatoes and green chilli and cook until the raw smell of tomato disappears.
Now add the spice powder paste and mix well.
Add boiled dal into spice mixture and give a good mix.
At this point, add 1½-2 cups of water and add fried fish heads.
Allow the dal to boil for 5-10 minutes and later switch off the gas and top with ghee.