Step 1 Marinate the prawns
In a large bowl add prawns(peeled and de-veined), soy sauce, garlic, brown sugar, white wine vinegar, and 1 Tablespoon olive oil. Mix well until prawns are coated evenly. Cover and refrigerate for at least 30 minutes.
Step 2 Cook the prawns
Take a medium-sized skillet and heat 1 tablespoon olive oil over medium-high flame. Remove the prawns with a slotted spoon and add to the skillet. Cook for 2-3 minutes until prawns are pink. Then, remove the prawns and set aside on a plate.
Step 3 Make the sauce and add prawns to it
Pour the marinade into the skillet and let it simmer until it becomes thick. Then, add the prawns back to the skillet and add in the sauce. Mix well and cook for a minute. Garnish with chopped green onions and sesame seeds if desired and serve over rice.
English 
Sinhala