An all-American dish with a Chinese accent.
Mix the beef, salt, onion, crumbs, egg, reserved pineapple syrup and ½ cup of the chunks, cut very small. Shape into small balls.
Bring the catsup, vinegar and brown sugar to a boil. Add the meatballs and remaining pineapple chunks. Simmer, covered for 25 minutes. Serve hot, with cooked rice.