Wash and prepare prawns.

On medium heat, heat oil in wok.

Add garlic and fry till fragrant.

Add onions and fry till fragrant.

Add water and oyster sauce. Bring to medium high heat and simmer for 1-2mins.

Add prawns, and stir fry.

When prawns are starting to cook, add sugar. Continue to stir fry.

When prawns are almost cooked, add black pepper to taste. Add more sauce if required.