Here is recipe for Maharashtrian style prawns curry. ( Maharashtra is a state from India)
Ingredients- 1 pound of large/ medium size prawns, 1medium onion, ginger-garlic paste, tamarind pulp, 1/2 cup of coconut milk or finely grated coconut, 1 1/2 tsp chilli powder ( you can vary to the level of spiciness you want ), 1/4 tsp turmeric, salt to taste, finely chopped coriander/cilantro.
Clean & then marinate the prawns with ginger-garlic paste, salt, turmeric, chilli powder & tamarind pulp. Then heat up oil in a wide bottom vessel, add the onions. Once the onions become transparent & start turning brown, add the prawns, saute them till you see the colour changing to pink. Then add water & lower the flame. Add the coconut milk/ grated coconut , cover the vessel & let it cook. The prawns cook very fast about 15min or so. You can add more water depending on the consistency you want. Garnish with fresh corainder. Serve this with white rice.