Clean your tin fish thoroughly, then rinse this. If you want to use the gravy in the can strain this. Remember you need to clean this well because you dont want bones in your curry

Fry onion in oil, until golden brown

Add ginger garlic, and then a teaspoon of turmeric and two table spoons of chilli powder, then add your tomatoes. You can also add a green chillie if needed. Let this cook for two minutes

Add on your tin fish and then add salt