Add all of this stuff to a blender – 1 small bunch of coriander, 2 green chillies, 4 cloves of garlic, 1 piece of ginger (the size of the first digit of your thumb), 1 tsp each of tamarind paste, red chilli powder and turmeric. Blitz for 30 seconds and make a paste.
Add salt, and marinate 250 gm prawns in the paste for 30 min
Heat oil. Add a pinch of asafoetida, 2 slit green chillies and 3 sliced cloves of garlic.
Throw in one chopped onion and cook till golden brown
Add one chopped tomato and cook till soft
Tip in the marinated prawns and cook for 3 min on medium heat
Add 1/4 cup of coconut milk and mix
Turn down the heat and cook on low for 10 min
Garnish with chopped coriander and serve with rice