Barbecued meatballs are great and they're even better in a homemade barbecue sauce that includes beer. That's exactly what you'll find with this easy recipe and it's all done in the slow cooker, so it's even easier. These barbecued meatballs are made with frozen prepared meatballs, though you can also use your own homemade meatball recipe. The sauce is made from scratch and it's very simple. All you need is ketchup, red wine vinegar, onions, and a few common spices. There's also beer, which gives it a great flavor. This recipe makes about 96 meatballs but can easily be cut in half if you need to feed just a few people. It's a great recipe for game day parties, picnics, or anytime you just feel like eating delicious barbecue meatballs.