1. Add water to boil the meatballs and simmer for a while.
2. Saute the mashed potatoes with a little oil, add water to cook and press into a puree.
3. Meatballs and mashed potatoes are on the plate.
4. Add the oyster sauce and flour to stir-fry the meatball soup until it is thick. Add black pepper to the mashed potatoes and meatballs.
