Presenting the recipe below from the above link with minor changes:
Prawns (shelled, deveined and cleaned) - 500 grams
Turmeric powder - 1/2 teaspoon
Onion paste - 1 cup
Ginger paste - 1 teaspoon
Chilli paste or powder - 1 tablespoon
Bay leaf - 1 or 2
Cinnamon - 1 small stick
Cloves - 4
Cardamoms - 4
Coconut milk - 2 cups
Corinader leaves - few
Ghee / butter - 2 tablespoons
salt to taste
Rub the prawns with some salt and wash well. Apply some turmeric powder and keep aside for 5 minutes.
Heat half the ghee (clarified butter) in a heavy-bottomed pan and saute the prawns for 10 mintues until they are soft.
Strain the prawns from the pan and keep aside. Now, add the bay leaves, cloves, cinnamon and green cardamoms and saute them.
Add the onion paste and stir fry on medium heat for about 10-15 minutes, till the paste is browned.
Then add chilli paste/powder and ginger paste. Fry briefly on low heat till the oil separates.
Add the prawns and coconut milk and salt as required. Mix gently. Simmer on low heat for about 2 minutes.
Mix in the remaining ghee (clarified butter) and cover tight for a little while.
Garnish with coriander leaves and serve hot with plain rice.
Cooking time - 30-40 minutes
Serves 4-5 persons.