Here's a recipe from my mom that's a favorite for parties.
The recipe makes a ton of sauce. If you like, you can set aside half of the sauce prior to adding the meatballs and freeze it for later use. When ready to use, thaw and heat sauce then add the meatballs.
Cocktail Meatballs in Barbecue Sauce
1 can jellied cranberry sauce
1 (12 oz.) bottle chili sauce (You'll find it near the ketchup, barbecue sauce, etc.)
1/4 cup brown sugar
1 tbsp. lemon juice
2 lbs. 1-inch MSPI-friendly meatballs
1-2 packages Li'l Smokies (opt.)
Mix sauce ingredients and heat until cranberry sauce is melted. Add meatballs and smokies and simmer one hour.