In a mixing bowl, combine all ingredients in the For the Meatballs section. Mix gently just until everything is combined. Don't over-mix or the meatballs may not turn out tender. Marinate for about 15 minutes.
Form the ground pork mixture into meatballs, with about 2 teaspoons of meat mixture per meatball.
Place a deep pot over medium heat. Add some oil to lightly coat the bottom. Then add the ginger slices, and sauté until fragrant. Add the white parts of scallion, and continue to sauté briefly until fragrant.
Add the rice and stir-fry up to a minute. Then add the water and salt. Bring it to a boil. Skim off foam if needed.
Drop the pork meatballs into the pot and poach for a couple minutes or until they are just cooked through. They should be cooked through shortly after they float to the surface.
Take the meatballs out of the pot. Since they have floated to the surface, it will be easy to take them out without disturbing the rice. Set them aside and cover to prevent the exterior from drying out.
Maintain a simmer and place a lid askew over the congee pot. Simmer for about 30 minutes or until the rice is very soft and the consistency is to your liking. Give everything a gentle stir, then taste and adjust the seasonings.
Add the meatballs back to the congee to heat them through. Transfer to serving bowls, and top with black pepper, chopped scallion, and ginger. Serve right away.