I never tell people what's in these until after they've tried them, because I have to admit, the ingredients don't sound very appealing, but these are always a huge hit at parties and pot lucks. And after they've tasted them, people beg for the recipe.
Mix together sausage, breadcrumbs and beaten eggs. Form into golf ball-sized balls.
Brown sausage balls, either in a pan on the stove top or on a cookie sheet in the oven.
Whisk together ketchup, vinegar, soy sauce and brown sugar.
Transfer browned sausage balls to a medium-large saucepan and pour sauce over them. Cover and simmer on medium low for 30-40 minutes, stirring occasionally. Cut one sausage ball in half and check for doneness before serving.