Marinate the prawn with ½ tbsp oyster sauce for 10 minutes. Mix corn starch 3.5 tbsp oyster sauce with water and egg, then mix well.
Heat the oil with medium low heat, fry prawns and ham. Add yellow chives, bean sprouts, green onion and onion. Stir fry the ingredients, then set aside.
Add the cooked ingredients into the egg mixture. Mix well.
Heat the pan with medium low heat, add half of the mixture. Fry until both sides are golden. Repeat until the egg mixture is used up. Garnish with coriander. Serve with cooked rice.
Tips: Add more oil to pan fry the egg to get a crispy edge.