Heat the ghee or oil in a large heavy-based saucepan.
Add the onion and garlic and fry over a low heat for 4-5
minutes until golden and soft.
Mix together the ground
coriander, ginger, turmeric, cumin and chili powder in
a small bowl. Mix in the vinegar to make a smooth paste.
Add the spice paste
to the onion and garlic mixture in the pan and fry
gently, stirring constantly with a wooden spoon, for 3
minutes.
Tip in the prawns and turn gently with a wooden
spoon until they are well coated with the spices. Stir
in the water and then simmer over a low heat for 2-3
minutes.
Serve immediately, garnished with coriander
leaves, with plain boiled rice.