1. Marinate the shrimps/prawns with the chillie powder, turmeric powder, cumin powder, coriander powder, vinegar and salt and keep aside for 15 minutes.
2. Heat oil in a pan and fry the onions till golden brown. Add the garlic paste, ginger paste and tomatoes and fry till the tomatoes turn pulpy.
3. Add the marinated prawns/shrimps and mix well.
4. Add 1 cup of water and cook on medium heat for about 20 minutes till the prawns/shrimps are cooked.
5. Serve with rice, Bread or Chapattis

Recipe courtesy: Anglo-Indian Recipes