"Fish Kuzhambu" in South India

I can provide you with a simple fish gravy recipe. One popular fish gravy is the Indian-style fish curry, also known as "Fish Kuzhambu" in South India. Here's a basic recipe: Ingredients: 500g fish (any firm-fleshed fish like tilapia, cod, or catfish) 1 large onion, finely chopped 2 tomatoes, chopped 1/2 cup tamarind extract (soak tamarind in warm water and extract the juice) 1/2 cup coconut milk (optional) 2 tablespoons oil 1 teaspoon mustard seeds 1 teaspoon fenugreek seeds 1 sprig curry leaves 1 teaspoon turmeric powder 2 tablespoons chili powder (adjust according to your spice preference) 1 tablespoon coriander powder Salt to taste Fresh coriander leaves for garnish