Peal and clean the Shrimps. Wash and drain well.

Peal and remove the husk of ridge gourd and cut into small pieces.

Put a deep bottomed pan on the stove. Add oil and heat. Splutter mustard seeds. Add the onion paste and fry for a few minutes. Add chopped onion and fry until the contents turn brown.

Add the prawns and fry further. Add red chilly powder, green chillies, turmeric powder, ginger-garlic paste and the ridge gourd pieces and fry. Add the tomato pieces, mix well and finally add salt. Again mix thoroughly.

Add enough water, cover the pan with a lid and allow to simmer in medium flame until the prawns and ridge gourd pieces are cooked well and the oil gets separated.

Top the preparation with finely chopped coriander leaves and serve hot with rice or chappathis.