Wash prawns, cut off feelers and make a
slit down the back to de-vein. Dry prawns well with paper towels
and arrange on an oven-proof serving dish. Pound coriander roots
with pepper and garlic. Heat oil in a small frying pan.
Add the pounded ingredients and stir-fry for about 2 minutes until
fragrant. Stir in the soy sauce and sugar and turn off the heat.
Preheat oven at 180°C. Pour the sauce mixture over the prawns
and bake for 8 to 10 minutes until shells turn bright red.
Serve.