heat oil in a pan

add chopped ginger, garlic, turmeric, and green chilli. if fresh turmeric is not available then use turmeric powder instead. Fry for a couple of minutes.

add chopped onion and fry until translucent

add coconut and fry for a couple of minutes

add tomato and fry until soft

add salt to taste and chilli powder and fry for a minute

add chopped coriander leaves and mix well. turn off the heat

wait till it cools down, and grind in a blender until smooth.

serve with hot idlis or dosas