Alternately, place meatballs into two 9x13-inch baking dishes and brown in a 475 degree oven.
Combine catsup, brown sugar, vinegar, and soy sauce in a large Dutch oven.
Pour over sausage balls and simmer 20 minutes, stirring occasionally. Refrigerate overnight.
The next day return the meatballs to the Dutch oven and simmer for 5 minutes or until the meatballs are heated through. You can also reheat these in the microwave. Serve in hot chafing dish.
If balls are to be frozen, freeze in sauce, then reheat slowly to thaw until hot.
Gluten-Free Adaptation:
Substitute cooked white rice for bread crumbs and tamari for soy sauce.