In the meatballs I add an egg, crushed cracker crumbs and whatever spices you want. I cook them in the oven for about 20 minutes.
In the meantime, I start the sauce in a saucepan on low heat. Measurements are all approx - I lost the real recipe years ago!
1/2 brown sugar
4 tablespoons corn syrup
2 tablespoons vinegar
1 tsp dry mustard
Heat that and bring to a boil. Suggest you taste test it to make sure it's not too sweet or sour.
Pour it over the meatballs and cook for an additional 20 mins. I always kind of roll the meatballs around so they are covered on all sides.