Add in your grated pepper, onion, Maggi,salt,oil and water....the amount of water you put depends on the amount of fish you have
Note: you can add garlic, curry and other spices of your choice

Add in your oil and let it cook until it thickens
If it's too watery for you, you can add thickeners like cornflour,semolina, semovita etc
But the fish can thickens on its own
Enjoy it with white rice or any swallow of your choice