Finely chop the onions, and grate the ginger root.
In a large bowl, mix the ground pork, egg, bread crumbs, onion.
Subsequently, add the Tamari sauce, white pepper and ginger root and mix well.
Shape the mixture into one inch balls.
Either place the meatballs in a preheated oven to 200 degrees or otherwise use a big pan and fry them in two batches using the olive oil for frying.
For the sauce, finely chop the carrot and the green pepper.
In a large pan over medium heat, pour a cup of pineapple juice, soy sauce and vinegar until smooth.
Add the pineapple chunks, carrot and green pepper into the sauce and leave to simmer. Occasionally stir, and add water if necessary cause the mixture might dry quickly..
Leave to cook for 15 minutes uncovered. Then add the meatballs and quartered tomatoes for 5 minutes on low heat.