Wash rice and place in large saucepan.
Add in 10 cups of water, and cook on high heat and bring to the boil. Then turn to low heat and let cook for about an hour until congee forms.
Wash all ingredients well. Remove intestines of prawns, and also marinade oysters with some salt. Then drain away the water. Cut checkers on sliced cuttlefish.
Bring congee to the boil on high heat, then put in seafood ingredients and let cook for 3-4 minutes until ingredients are cooked thoroughly.
Stir in ginger, salt and pepper. Cook for another minute and serve.
Garnish with chinese celery and some pepper.