Grind the soaked cumin seeds, ginger, garlic, 1 fresh chilli and onion along with 1/4 cup water into a fine paste. Add the turmeric powder and garam masala powder to it and keep aside.
Marinate the prawns with a pinch of turmeric powder and salt for 10 minutes. Heat oil in a pan and saute them for a minute or till they turn pink in colour. Drain and keep aside.
Temper the same oil with kalonji, cardamoms, cinnamon and cloves. Saute for a few seconds. Add the ground paste and fry on low flame till the oil separates.
Add the coconut milk, salt, fried prawns and slit fresh chilli. Simmer for 2-3 minutes.
Serve, garnish with coriander leaves.
